#90AEC4
Closest named color: Cool Steel (#97A7B3). oklch(73.6% 0.046 240.1), rgb(144, 174, 196).
Aa
Black text reads best on this color (9.03:1).
About this color
#90AEC4 is a medium-light, muted blue. In OKLCH its lightness is 74%, its chroma 0.046 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Steel (#97A7B3), ΔE 0.026 away. Black text reads best on it, at 9.03:1.
| Hue family | Blues |
| Lightness | medium-light (74%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | Cool Steel (#97A7B3) |
| Black text | 9.03:1 |
| White text | 2.32:1 |
Values
| HEX | #90AEC4 |
| RGB | rgb(144, 174, 196) |
| HSL | hsl(205, 31%, 67%) |
| OKLCH | oklch(73.6% 0.046 240.1) |
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 #90AEC4 | 2.32:1 | Fails | Lc -50.7 | Large or bold text, headings |
| Black text on #90AEC4 | 9.03:1 | AAA | Lc 58.2 | Large or bold text, headings |
| #90AEC4 text on white | 2.32:1 | Fails | Lc 45.8 | Large or bold text, headings |
| #90AEC4 text on black | 9.03:1 | AAA | Lc -56.3 | Large or bold text, headings |
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 400.
-
Step 50
50
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EBEF
oklch(93.7% 0.008 236.6)
-
Step 200
200
#D0DBE3
oklch(88.5% 0.016 239.1)
-
Step 300
300
#B1C4D2
oklch(81% 0.029 239.7)
-
Step 400
400 (this color)
#90AEC4
oklch(73.6% 0.046 240.1)
-
Step 500
500
#698FAA
oklch(63.2% 0.059 239.8)
-
Step 600
600
#507995
oklch(55.7% 0.063 239.2)
-
Step 700
700
#40657F
oklch(49% 0.06 240.2)
-
Step 800
800
#355367
oklch(42.7% 0.049 238.6)
-
Step 900
900
#2F4454
oklch(37.6% 0.038 241.8)
-
Step 950
950
#1C2831
oklch(27% 0.024 241.1)
#90AEC4 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) | #A5ADC5 | 0.027 |
| Deuteranopia (no green cones) | #9EA7C4 | 0.025 |
| Tritanopia (no blue cones) | #81B3B5 | 0.035 |
| Achromatopsia (no color) | #AAAAAA | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #90AEC4
#90AEC4
oklch(73.6% 0.046 240.1)
- #C0A38D
#C0A38D
oklch(73.5% 0.046 59.2)
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 #90AEC4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Steel #97A7B3 ΔE 0.026
- Bluegrey #85A3B2 ΔE 0.039
- Bluey Grey #89A0B0 ΔE 0.044
- Cool Grey #95A3A6 ΔE 0.044
- Light Grey Blue #9DBCD4 ΔE 0.045
- Dark Gray #A9A9A9 ΔE 0.046
- French Gray #ADB5BD ΔE 0.046
- Pewter #96A8A1 ΔE 0.048
Use #90AEC4 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.