#90AFBF
Closest named color: Cool Steel (#97A7B3). oklch(73.6% 0.041 230.5), rgb(144, 175, 191).
Aa
Black text reads best on this color (9.07:1).
About this color
#90AFBF is a medium-light, muted blue. In OKLCH its lightness is 74%, its chroma 0.041 and its hue 230°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Steel (#97A7B3), ΔE 0.024 away. Black text reads best on it, at 9.07:1.
| Hue family | Blues |
| Lightness | medium-light (74%) |
| Chroma | muted (0.041) |
| Temperature | cool |
| Nearest name | Cool Steel (#97A7B3) |
| Black text | 9.07:1 |
| White text | 2.31:1 |
Values
| HEX | #90AFBF |
| RGB | rgb(144, 175, 191) |
| HSL | hsl(200, 27%, 66%) |
| OKLCH | oklch(73.6% 0.041 230.5) |
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 #90AFBF | 2.31:1 | Fails | Lc -50.5 | Large or bold text, headings |
| Black text on #90AFBF | 9.07:1 | AAA | Lc 58.3 | Large or bold text, headings |
| #90AFBF text on white | 2.31:1 | Fails | Lc 45.7 | Large or bold text, headings |
| #90AFBF text on black | 9.07:1 | AAA | Lc -56.4 | 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
#D0DBE1
oklch(88.5% 0.015 231.2)
-
Step 300
300
#B1C4CE
oklch(80.9% 0.025 230.5)
-
Step 400
400 (this color)
#90AFBF
oklch(73.6% 0.041 230.5)
-
Step 500
500
#6990A4
oklch(63.2% 0.053 230.9)
-
Step 600
600
#4F7A8F
oklch(55.6% 0.058 230.2)
-
Step 700
700
#406679
oklch(49% 0.053 231)
-
Step 800
800
#355463
oklch(42.8% 0.044 230)
-
Step 900
900
#2E4551
oklch(37.7% 0.035 231.6)
-
Step 950
950
#1B292F
oklch(27.1% 0.022 226.4)
#90AFBF 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) | #A7AEC0 | 0.030 |
| Deuteranopia (no green cones) | #A0A8BF | 0.027 |
| Tritanopia (no blue cones) | #82B4B4 | 0.030 |
| Achromatopsia (no color) | #AAAAAA | 0.041 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #90AFBF
#90AFBF
oklch(73.6% 0.041 230.5)
- #C0A393
#C0A393
oklch(73.7% 0.041 50.6)
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 #90AFBF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Steel #97A7B3 ΔE 0.024
- Bluegrey #85A3B2 ΔE 0.038
- Cool Grey #95A3A6 ΔE 0.040
- Dark Gray #A9A9A9 ΔE 0.041
- Pewter #96A8A1 ΔE 0.041
- French Gray #ADB5BD ΔE 0.043
- Bluey Grey #89A0B0 ΔE 0.044
- Light Grey Blue #9DBCD4 ΔE 0.045
Use #90AFBF 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.