#90ABBF
Closest named color: Cool Steel (#97A7B3). oklch(72.8% 0.042 240.2), rgb(144, 171, 191).
Aa
Black text reads best on this color (8.76:1).
About this color
#90ABBF is a medium-light, muted blue. In OKLCH its lightness is 73%, its chroma 0.042 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Steel (#97A7B3), ΔE 0.018 away. Black text reads best on it, at 8.76:1.
| Hue family | Blues |
| Lightness | medium-light (73%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Cool Steel (#97A7B3) |
| Black text | 8.76:1 |
| White text | 2.39:1 |
Values
| HEX | #90ABBF |
| RGB | rgb(144, 171, 191) |
| HSL | hsl(206, 27%, 66%) |
| OKLCH | oklch(72.8% 0.042 240.2) |
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 #90ABBF | 2.39:1 | Fails | Lc -52.2 | Large or bold text, headings |
| Black text on #90ABBF | 8.76:1 | AAA | Lc 56.8 | Large or bold text, headings |
| #90ABBF text on white | 2.39:1 | Fails | Lc 47.2 | Large or bold text, headings |
| #90ABBF text on black | 8.76:1 | AAA | Lc -54.8 | 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
#E6EBEE
oklch(93.7% 0.007 233.6)
-
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)
#90ABBF
oklch(72.8% 0.042 240.2)
-
Step 500
500
#6C8EA7
oklch(63% 0.054 240.5)
-
Step 600
600
#547892
oklch(55.6% 0.058 240.5)
-
Step 700
700
#44657D
oklch(49.1% 0.054 240.8)
-
Step 800
800
#385265
oklch(42.6% 0.045 240.8)
-
Step 900
900
#314452
oklch(37.6% 0.034 240.7)
-
Step 950
950
#1D2830
oklch(27% 0.021 240.1)
#90ABBF 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) | #A3AAC0 | 0.025 |
| Deuteranopia (no green cones) | #9CA5BF | 0.022 |
| Tritanopia (no blue cones) | #83B0B1 | 0.033 |
| Achromatopsia (no color) | #A7A7A7 | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #90ABBF
#90ABBF
oklch(72.8% 0.042 240.2)
- #BBA18D
#BBA18D
oklch(72.7% 0.042 59.6)
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 #90ABBF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Steel #97A7B3 ΔE 0.018
- Bluegrey #85A3B2 ΔE 0.031
- Bluey Grey #89A0B0 ΔE 0.035
- Cool Grey #95A3A6 ΔE 0.036
- Pewter #96A8A1 ΔE 0.042
- Dark Gray #A9A9A9 ΔE 0.042
- Greyblue #77A1B5 ΔE 0.045
- Cool Gray #8D99AE ΔE 0.050
Use #90ABBF 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.