#128FEE
Closest named color: Dodger Blue (#1E90FF). oklch(63.8% 0.172 249.3), rgb(18, 143, 238).
Aa
Black text reads best on this color (6.18:1).
About this color
#128FEE is a medium-light, vivid blue. In OKLCH its lightness is 64%, its chroma 0.172 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Dodger Blue (#1E90FF), ΔE 0.026 away. Black text reads best on it, at 6.18:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.172) |
| Temperature | cool |
| Nearest name | Dodger Blue (#1E90FF) |
| Black text | 6.18:1 |
| White text | 3.39:1 |
Values
| HEX | #128FEE |
| RGB | rgb(18, 143, 238) |
| HSL | hsl(206, 87%, 50%) |
| OKLCH | oklch(63.8% 0.172 249.3) |
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 #128FEE | 3.39:1 | AA large text | Lc -66.2 | Content text, not long reading |
| Black text on #128FEE | 6.18:1 | AA | Lc 43.3 | Non-text elements, placeholder text |
| #128FEE text on white | 3.39:1 | AA large text | Lc 60.8 | Content text, not long reading |
| #128FEE text on black | 6.18:1 | AA | Lc -40.9 | 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
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DEECFA
oklch(93.7% 0.024 248.1)
-
Step 200
200
#C2DCF7
oklch(88.4% 0.047 249.4)
-
Step 300
300
#96C6F5
oklch(81% 0.084 248.4)
-
Step 400
400
#57A6F1
oklch(70.7% 0.135 249.2)
-
Step 500
500 (this color)
#128FEE
oklch(63.8% 0.172 249.3)
-
Step 600
600
#0076C9
oklch(55.6% 0.155 249.4)
-
Step 700
700
#0063AA
oklch(49.1% 0.137 249.4)
-
Step 800
800
#00518C
oklch(42.7% 0.118 249.2)
-
Step 900
900
#004376
oklch(37.6% 0.105 249.5)
-
Step 950
950
#032847
oklch(27.1% 0.07 248.8)
#128FEE 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) | #5F95F2 | 0.054 |
| Deuteranopia (no green cones) | #3B83EC | 0.033 |
| Tritanopia (no blue cones) | #00A6B3 | 0.124 |
| Achromatopsia (no color) | #8B8B8B | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #128FEE
#128FEE
oklch(63.8% 0.172 249.3)
- #C07900
#C07900
oklch(63.6% 0.139 69.3)
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 #128FEE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dodger Blue #1E90FF ΔE 0.026
- Dark Sky Blue #448EE4 ΔE 0.027
- Chefchaouen Blue #4895EF ΔE 0.034
- Water Blue #0E87CC ΔE 0.053
- Soft Blue #6488EA ΔE 0.054
- Cornflower Blue #6495ED ΔE 0.058
- Clear Blue #247AFD ΔE 0.061
- Cornflower #6A79F7 ΔE 0.080
Use #128FEE 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.