#3189EF
Closest named color: Dark Sky Blue (#448EE4). oklch(63% 0.174 254.8), rgb(49, 137, 239).
Aa
Black text reads best on this color (5.95:1).
About this color
#3189EF is a medium-light, vivid blue. In OKLCH its lightness is 63%, its chroma 0.174 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.027 away. Black text reads best on it, at 5.95:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.174) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.95:1 |
| White text | 3.52:1 |
Values
| HEX | #3189EF |
| RGB | rgb(49, 137, 239) |
| HSL | hsl(212, 86%, 56%) |
| OKLCH | oklch(63% 0.174 254.8) |
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 #3189EF | 3.52:1 | AA large text | Lc -67.8 | Content text, not long reading |
| Black text on #3189EF | 5.95:1 | AA | Lc 41.7 | Non-text elements, placeholder text |
| #3189EF text on white | 3.52:1 | AA large text | Lc 62.4 | Content text, not long reading |
| #3189EF text on black | 5.95:1 | AA | Lc -39.3 | 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
#DFEBFB
oklch(93.6% 0.025 255.6)
-
Step 200
200
#C5DBF9
oklch(88.5% 0.048 256.2)
-
Step 300
300
#9BC4F7
oklch(80.9% 0.085 254.2)
-
Step 400
400
#63A3F3
oklch(70.7% 0.135 254.8)
-
Step 500
500 (this color)
#3189EF
oklch(63% 0.174 254.8)
-
Step 600
600
#0071DA
oklch(55.6% 0.182 254.8)
-
Step 700
700
#005FB9
oklch(49.2% 0.161 254.8)
-
Step 800
800
#004D99
oklch(42.7% 0.14 255)
-
Step 900
900
#0B417C
oklch(37.8% 0.114 254.8)
-
Step 950
950
#0A2648
oklch(26.9% 0.072 255.3)
#3189EF 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) | #5592F3 | 0.040 |
| Deuteranopia (no green cones) | #3081ED | 0.021 |
| Tritanopia (no blue cones) | #00A1B0 | 0.131 |
| Achromatopsia (no color) | #888888 | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3189EF
#3189EF
oklch(63% 0.174 254.8)
- #B87B00
#B87B00
oklch(63% 0.133 74.4)
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 #3189EF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.027
- Dodger Blue #1E90FF ΔE 0.027
- Chefchaouen Blue #4895EF ΔE 0.039
- Soft Blue #6488EA ΔE 0.044
- Clear Blue #247AFD ΔE 0.047
- Water Blue #0E87CC ΔE 0.057
- Cornflower Blue #6495ED ΔE 0.058
- Cornflower #6A79F7 ΔE 0.063
Use #3189EF 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.