#90C9EE
Closest named color: Sky Blue (#87CEEB). oklch(81% 0.079 237.5), rgb(144, 201, 238).
Aa
Black text reads best on this color (11.77:1).
About this color
#90C9EE is a light, moderately saturated blue. In OKLCH its lightness is 81%, its chroma 0.079 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Sky Blue (#87CEEB), ΔE 0.017 away. Black text reads best on it, at 11.77:1.
| Hue family | Blues |
| Lightness | light (81%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Sky Blue (#87CEEB) |
| Black text | 11.77:1 |
| White text | 1.78:1 |
Values
| HEX | #90C9EE |
| RGB | rgb(144, 201, 238) |
| HSL | hsl(204, 73%, 75%) |
| OKLCH | oklch(81% 0.079 237.5) |
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 #90C9EE | 1.78:1 | Fails | Lc -36.9 | Non-text elements, placeholder text |
| Black text on #90C9EE | 11.77:1 | AAA | Lc 71.0 | Content text, not long reading |
| #90C9EE text on white | 1.78:1 | Fails | Lc 32.8 | Non-text elements, placeholder text |
| #90C9EE text on black | 11.77:1 | AAA | Lc -69.8 | Content text, not long reading |
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 300.
-
Step 50
50
#EFF7FC
oklch(97.2% 0.011 234.8)
-
Step 100
100
#DCEDF8
oklch(93.7% 0.023 236)
-
Step 200
200
#BFDEF3
oklch(88.5% 0.044 237.6)
-
Step 300
300 (this color)
#90C9EE
oklch(81% 0.079 237.5)
-
Step 400
400
#45ABE5
oklch(70.7% 0.126 237.5)
-
Step 500
500
#0094D2
oklch(63.2% 0.138 237.1)
-
Step 600
600
#007CB2
oklch(55.6% 0.123 237.7)
-
Step 700
700
#006896
oklch(49.1% 0.108 237.6)
-
Step 800
800
#00557C
oklch(42.7% 0.094 237.9)
-
Step 900
900
#004768
oklch(37.7% 0.083 237.5)
-
Step 950
950
#002A40
oklch(27% 0.06 237.8)
#90C9EE 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) | #B8C8F0 | 0.048 |
| Deuteranopia (no green cones) | #ACBDED | 0.043 |
| Tritanopia (no blue cones) | #6DD3D5 | 0.062 |
| Achromatopsia (no color) | #C2C2C2 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #90C9EE
#90C9EE
oklch(81% 0.079 237.5)
- #E8B58F
#E8B58F
oklch(81% 0.078 58.1)
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 #90C9EE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sky Blue #87CEEB ΔE 0.017
- Light Sky Blue #87CEFA ΔE 0.019
- Sky #82CAFC ΔE 0.023
- Lightblue #7BC8F6 ΔE 0.024
- Light Cornflower Blue #98C1D9 ΔE 0.031
- Baby Blue #A2CFFE ΔE 0.034
- Light Steel Blue #B0C4DE ΔE 0.040
- Cloudy Blue #ACC2D9 ΔE 0.040
Use #90C9EE 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.