#90A5BF
Closest named color: Cool Steel (#97A7B3). oklch(71.5% 0.045 253.9), rgb(144, 165, 191).
Aa
Black text reads best on this color (8.32:1).
About this color
#90A5BF is a medium-light, muted blue. In OKLCH its lightness is 71%, its chroma 0.045 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Steel (#97A7B3), ΔE 0.022 away. Black text reads best on it, at 8.32:1.
| Hue family | Blues |
| Lightness | medium-light (71%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Cool Steel (#97A7B3) |
| Black text | 8.32:1 |
| White text | 2.52:1 |
Values
| HEX | #90A5BF |
| RGB | rgb(144, 165, 191) |
| HSL | hsl(213, 27%, 66%) |
| OKLCH | oklch(71.5% 0.045 253.9) |
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 #90A5BF | 2.52:1 | Fails | Lc -54.6 | Large or bold text, headings |
| Black text on #90A5BF | 8.32:1 | AAA | Lc 54.5 | Large or bold text, headings |
| #90A5BF text on white | 2.52:1 | Fails | Lc 49.5 | Large or bold text, headings |
| #90A5BF text on black | 8.32:1 | AAA | Lc -52.5 | 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
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAEF
oklch(93.5% 0.008 253.9)
-
Step 200
200
#D2DAE3
oklch(88.5% 0.015 251.2)
-
Step 300
300
#B5C2D3
oklch(80.9% 0.028 255.1)
-
Step 400
400 (this color)
#90A5BF
oklch(71.5% 0.045 253.9)
-
Step 500
500
#728CAC
oklch(63.2% 0.057 253.9)
-
Step 600
600
#5A7597
oklch(55.5% 0.062 254.5)
-
Step 700
700
#4A6381
oklch(49.2% 0.057 253.4)
-
Step 800
800
#3D5169
oklch(42.8% 0.047 253.4)
-
Step 900
900
#344355
oklch(37.7% 0.037 253.3)
-
Step 950
950
#1E2732
oklch(26.9% 0.024 253.7)
#90A5BF 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) | #9CA6C0 | 0.017 |
| Deuteranopia (no green cones) | #97A1BE | 0.013 |
| Tritanopia (no blue cones) | #83ABAD | 0.040 |
| Achromatopsia (no color) | #A3A3A3 | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #90A5BF
#90A5BF
oklch(71.5% 0.045 253.9)
- #B49F84
#B49F84
oklch(71.4% 0.045 73.9)
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 #90A5BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Steel #97A7B3 ΔE 0.022
- Bluegrey #85A3B2 ΔE 0.025
- Bluey Grey #89A0B0 ΔE 0.026
- Cool Grey #95A3A6 ΔE 0.036
- Cool Gray #8D99AE ΔE 0.036
- Greyblue #77A1B5 ΔE 0.037
- Pewter #96A8A1 ΔE 0.048
- Dark Gray #A9A9A9 ΔE 0.049
Use #90A5BF 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.