#90C5FF
Closest named color: Sky (#82CAFC). oklch(80.8% 0.1 251.3), rgb(144, 197, 255).
Aa
Black text reads best on this color (11.61:1).
About this color
#90C5FF is a light, moderately saturated blue. In OKLCH its lightness is 81%, its chroma 0.100 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Sky (#82CAFC), ΔE 0.020 away. Black text reads best on it, at 11.61:1.
| Hue family | Blues |
| Lightness | light (81%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Sky (#82CAFC) |
| Black text | 11.61:1 |
| White text | 1.80:1 |
Values
| HEX | #90C5FF |
| RGB | rgb(144, 197, 255) |
| HSL | hsl(211, 100%, 78%) |
| OKLCH | oklch(80.8% 0.1 251.3) |
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 #90C5FF | 1.80:1 | Fails | Lc -37.6 | Non-text elements, placeholder text |
| Black text on #90C5FF | 11.61:1 | AAA | Lc 70.3 | Content text, not long reading |
| #90C5FF text on white | 1.80:1 | Fails | Lc 33.5 | Non-text elements, placeholder text |
| #90C5FF text on black | 11.61:1 | AAA | Lc -69.1 | 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
#EFF6FE
oklch(97% 0.013 251.6)
-
Step 100
100
#DCECFD
oklch(93.6% 0.029 249.8)
-
Step 200
200
#BFDCFD
oklch(88.4% 0.055 251.8)
-
Step 300
300 (this color)
#90C5FF
oklch(80.8% 0.1 251.3)
-
Step 400
400
#4BA4FF
oklch(70.6% 0.158 251.5)
-
Step 500
500
#008BF4
oklch(63.1% 0.185 251.3)
-
Step 600
600
#0075CE
oklch(55.7% 0.162 251.1)
-
Step 700
700
#0062AE
oklch(49.1% 0.143 251.1)
-
Step 800
800
#005090
oklch(42.7% 0.125 251.1)
-
Step 900
900
#004279
oklch(37.6% 0.11 251.3)
-
Step 950
950
#00274B
oklch(27% 0.079 251.1)
#90C5FF 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) | #AEC7FF | 0.036 |
| Deuteranopia (no green cones) | #A1BCFE | 0.028 |
| Tritanopia (no blue cones) | #64D2D9 | 0.086 |
| Achromatopsia (no color) | #C1C1C1 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #90C5FF
#90C5FF
oklch(80.8% 0.1 251.3)
- #E9B677
#E9B677
oklch(80.9% 0.1 71.5)
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 #90C5FF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sky #82CAFC ΔE 0.020
- Pastel Blue #A2BFFE ΔE 0.024
- Lightblue #7BC8F6 ΔE 0.028
- Light Sky Blue #87CEFA ΔE 0.028
- Baby Blue #A2CFFE ΔE 0.036
- Carolina Blue #8AB8FE ΔE 0.036
- Sky Blue #87CEEB ΔE 0.044
- Light Cornflower Blue #98C1D9 ΔE 0.053
Use #90C5FF 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.