#90ACBF
Closest named color: Cool Steel (#97A7B3). oklch(73% 0.041 237.8), rgb(144, 172, 191).
Aa
Black text reads best on this color (8.83:1).
About this color
#90ACBF is a medium-light, muted blue. In OKLCH its lightness is 73%, its chroma 0.041 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Steel (#97A7B3), ΔE 0.019 away. Black text reads best on it, at 8.83:1.
| Hue family | Blues |
| Lightness | medium-light (73%) |
| Chroma | muted (0.041) |
| Temperature | cool |
| Nearest name | Cool Steel (#97A7B3) |
| Black text | 8.83:1 |
| White text | 2.37:1 |
Values
| HEX | #90ACBF |
| RGB | rgb(144, 172, 191) |
| HSL | hsl(204, 27%, 66%) |
| OKLCH | oklch(73% 0.041 237.8) |
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 #90ACBF | 2.37:1 | Fails | Lc -51.8 | Large or bold text, headings |
| Black text on #90ACBF | 8.83:1 | AAA | Lc 57.2 | Large or bold text, headings |
| #90ACBF text on white | 2.37:1 | Fails | Lc 46.8 | Large or bold text, headings |
| #90ACBF text on black | 8.83:1 | AAA | Lc -55.2 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBEE
oklch(93.6% 0.008 228.9)
-
Step 200
200
#D1DBE2
oklch(88.6% 0.015 238)
-
Step 300
300
#B2C3D0
oklch(80.8% 0.026 240.7)
-
Step 400
400 (this color)
#90ACBF
oklch(73% 0.041 237.8)
-
Step 500
500
#6B8FA6
oklch(63.2% 0.053 236.7)
-
Step 600
600
#537991
oklch(55.7% 0.057 236.9)
-
Step 700
700
#43657C
oklch(49% 0.054 238.9)
-
Step 800
800
#375365
oklch(42.8% 0.045 237.4)
-
Step 900
900
#304452
oklch(37.6% 0.035 239.4)
-
Step 950
950
#1C2830
oklch(26.9% 0.022 237.9)
#90ACBF 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) | #A4ABC0 | 0.026 |
| Deuteranopia (no green cones) | #9DA6BF | 0.022 |
| Tritanopia (no blue cones) | #83B1B2 | 0.032 |
| Achromatopsia (no color) | #A8A8A8 | 0.041 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #90ACBF
#90ACBF
oklch(73% 0.041 237.8)
- #BCA28F
#BCA28F
oklch(73% 0.041 58.2)
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 #90ACBF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Steel #97A7B3 ΔE 0.019
- Bluegrey #85A3B2 ΔE 0.032
- Cool Grey #95A3A6 ΔE 0.037
- Bluey Grey #89A0B0 ΔE 0.037
- Pewter #96A8A1 ΔE 0.041
- Dark Gray #A9A9A9 ΔE 0.042
- Greyblue #77A1B5 ΔE 0.047
- French Gray #ADB5BD ΔE 0.048
Use #90ACBF 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.