#90ACBB
Closest named color: Cool Steel (#97A7B3). oklch(72.8% 0.038 231.4), rgb(144, 172, 187).
Aa
Black text reads best on this color (8.80:1).
About this color
#90ACBB is a medium-light, muted blue. In OKLCH its lightness is 73%, its chroma 0.038 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Steel (#97A7B3), ΔE 0.016 away. Black text reads best on it, at 8.80:1.
| Hue family | Blues |
| Lightness | medium-light (73%) |
| Chroma | muted (0.038) |
| Temperature | cool |
| Nearest name | Cool Steel (#97A7B3) |
| Black text | 8.80:1 |
| White text | 2.38:1 |
Values
| HEX | #90ACBB |
| RGB | rgb(144, 172, 187) |
| HSL | hsl(201, 24%, 65%) |
| OKLCH | oklch(72.8% 0.038 231.4) |
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 #90ACBB | 2.38:1 | Fails | Lc -52.0 | Large or bold text, headings |
| Black text on #90ACBB | 8.80:1 | AAA | Lc 57.0 | Large or bold text, headings |
| #90ACBB text on white | 2.38:1 | Fails | Lc 47.0 | Large or bold text, headings |
| #90ACBB text on black | 8.80:1 | AAA | Lc -55.0 | 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
#D1DBE0
oklch(88.5% 0.013 228.9)
-
Step 300
300
#B2C4CD
oklch(80.9% 0.023 229.2)
-
Step 400
400 (this color)
#90ACBB
oklch(72.8% 0.038 231.4)
-
Step 500
500
#6C8FA2
oklch(63.1% 0.048 232.2)
-
Step 600
600
#53798D
oklch(55.5% 0.053 231.9)
-
Step 700
700
#436678
oklch(49.1% 0.049 231.5)
-
Step 800
800
#385361
oklch(42.6% 0.04 231.5)
-
Step 900
900
#30454F
oklch(37.7% 0.031 229)
-
Step 950
950
#1D282F
oklch(27% 0.02 236.4)
#90ACBB 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) | #A5ABBC | 0.028 |
| Deuteranopia (no green cones) | #9EA6BB | 0.023 |
| Tritanopia (no blue cones) | #84B0B1 | 0.026 |
| Achromatopsia (no color) | #A8A8A8 | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #90ACBB
#90ACBB
oklch(72.8% 0.038 231.4)
- #BBA192
#BBA192
oklch(72.8% 0.037 51.8)
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 #90ACBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Steel #97A7B3 ΔE 0.016
- Bluegrey #85A3B2 ΔE 0.030
- Cool Grey #95A3A6 ΔE 0.032
- Bluey Grey #89A0B0 ΔE 0.035
- Pewter #96A8A1 ΔE 0.036
- Dark Gray #A9A9A9 ΔE 0.038
- Greyblue #77A1B5 ΔE 0.046
- French Gray #ADB5BD ΔE 0.048
Use #90ACBB 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.