#1289FF
Closest named color: Dodger Blue (#1E90FF). oklch(63.6% 0.199 254.5), rgb(18, 137, 255).
Aa
Black text reads best on this color (6.04:1).
About this color
#1289FF is a medium-light, vivid blue. In OKLCH its lightness is 64%, its chroma 0.199 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Dodger Blue (#1E90FF), ΔE 0.019 away. Black text reads best on it, at 6.04:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.199) |
| Temperature | cool |
| Nearest name | Dodger Blue (#1E90FF) |
| Black text | 6.04:1 |
| White text | 3.47:1 |
Values
| HEX | #1289FF |
| RGB | rgb(18, 137, 255) |
| HSL | hsl(210, 100%, 54%) |
| OKLCH | oklch(63.6% 0.199 254.5) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #1289FF | 3.47:1 | AA large text | Lc -67.0 | Content text, not long reading |
| Black text on #1289FF | 6.04:1 | AA | Lc 42.5 | Non-text elements, placeholder text |
| #1289FF text on white | 3.47:1 | AA large text | Lc 61.5 | Content text, not long reading |
| #1289FF text on black | 6.04:1 | AA | Lc -40.2 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 500.
-
Step 50
50
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DDEBFD
oklch(93.5% 0.029 254.7)
-
Step 200
200
#C1DCFD
oklch(88.5% 0.054 253.6)
-
Step 300
300
#95C4FF
oklch(80.9% 0.098 254.5)
-
Step 400
400
#56A3FF
oklch(70.8% 0.155 254.3)
-
Step 500
500 (this color)
#1289FF
oklch(63.6% 0.199 254.5)
-
Step 600
600
#0071D9
oklch(55.6% 0.181 254.6)
-
Step 700
700
#005FB7
oklch(49.1% 0.158 254.4)
-
Step 800
800
#004E98
oklch(42.8% 0.138 254.3)
-
Step 900
900
#004080
oklch(37.6% 0.123 254.7)
-
Step 950
950
#03264D
oklch(27% 0.082 254.4)
#1289FF with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #4594FF | 0.042 |
| Deuteranopia (no green cones) | #0080FD | 0.024 |
| Tritanopia (no blue cones) | #00A6B8 | 0.148 |
| Achromatopsia (no color) | #8A8A8A | 0.199 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1289FF
#1289FF
oklch(63.6% 0.199 254.5)
- #BA7D00
#BA7D00
oklch(63.7% 0.134 74.8)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #1289FF, closest first.
No curated palette has a color within ΔE 0.04 of #1289FF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dodger Blue #1E90FF ΔE 0.019
- Clear Blue #247AFD ΔE 0.037
- Dark Sky Blue #448EE4 ΔE 0.051
- Chefchaouen Blue #4895EF ΔE 0.053
- Soft Blue #6488EA ΔE 0.061
- Cornflower #6A79F7 ΔE 0.069
- Cerulean Blue #056EEE ΔE 0.072
- Cornflower Blue #6495ED ΔE 0.073
Use #1289FF in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.