#90ACAF
Closest named color: Cool Steel (#97A7B3). oklch(72.4% 0.031 204.4), rgb(144, 172, 175).
Aa
Black text reads best on this color (8.70:1).
About this color
#90ACAF is a medium-light, muted teal or cyan. In OKLCH its lightness is 72%, its chroma 0.031 and its hue 204°. 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 8.70:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (72%) |
| Chroma | muted (0.031) |
| Temperature | cool |
| Nearest name | Cool Steel (#97A7B3) |
| Black text | 8.70:1 |
| White text | 2.41:1 |
Values
| HEX | #90ACAF |
| RGB | rgb(144, 172, 175) |
| HSL | hsl(186, 16%, 63%) |
| OKLCH | oklch(72.4% 0.031 204.4) |
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 #90ACAF | 2.41:1 | Fails | Lc -52.5 | Large or bold text, headings |
| Black text on #90ACAF | 8.70:1 | AAA | Lc 56.5 | Large or bold text, headings |
| #90ACAF text on white | 2.41:1 | Fails | Lc 47.5 | Large or bold text, headings |
| #90ACAF text on black | 8.70:1 | AAA | Lc -54.5 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E6EBEB
oklch(93.6% 0.005 197.1)
-
Step 200
200
#D1DBDC
oklch(88.4% 0.011 204.1)
-
Step 300
300
#B3C4C6
oklch(80.8% 0.019 205.3)
-
Step 400
400 (this color)
#90ACAF
oklch(72.4% 0.031 204.4)
-
Step 500
500
#6D9195
oklch(63.1% 0.04 204.7)
-
Step 600
600
#557B7F
oklch(55.6% 0.043 204.2)
-
Step 700
700
#45686B
oklch(49.2% 0.04 202.7)
-
Step 800
800
#395557
oklch(42.8% 0.034 201.6)
-
Step 900
900
#314648
oklch(37.7% 0.026 203.5)
-
Step 950
950
#1D292A
oklch(27% 0.017 202.6)
#90ACAF 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) | #A7A9AF | 0.031 |
| Deuteranopia (no green cones) | #A2A5AF | 0.029 |
| Tritanopia (no blue cones) | #87AEAD | 0.013 |
| Achromatopsia (no color) | #A7A7A7 | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #90ACAF
#90ACAF
oklch(72.4% 0.031 204.4)
- #B99F9C
#B99F9C
oklch(72.5% 0.031 25.7)
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 #90ACAF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Steel #97A7B3 ΔE 0.019
- Pewter #96A8A1 ΔE 0.020
- Cool Grey #95A3A6 ΔE 0.024
- Bluegrey #85A3B2 ΔE 0.032
- Dark Gray #A9A9A9 ΔE 0.033
- Bluey Grey #89A0B0 ΔE 0.037
- Cement #A5A391 ΔE 0.046
- Greyblue #77A1B5 ΔE 0.048
Use #90ACAF 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.