#90A3B4
Closest named color: Bluey Grey (#89A0B0). oklch(70.6% 0.033 245.3), rgb(144, 163, 180).
Aa
Black text reads best on this color (8.08:1).
About this color
#90A3B4 is a medium-light, muted blue. In OKLCH its lightness is 71%, its chroma 0.033 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Bluey Grey (#89A0B0), ΔE 0.014 away. Black text reads best on it, at 8.08:1.
| Hue family | Blues |
| Lightness | medium-light (71%) |
| Chroma | muted (0.033) |
| Temperature | cool |
| Nearest name | Bluey Grey (#89A0B0) |
| Black text | 8.08:1 |
| White text | 2.59:1 |
Values
| HEX | #90A3B4 |
| RGB | rgb(144, 163, 180) |
| HSL | hsl(208, 19%, 64%) |
| OKLCH | oklch(70.6% 0.033 245.3) |
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 #90A3B4 | 2.59:1 | Fails | Lc -55.9 | Large or bold text, headings |
| Black text on #90A3B4 | 8.08:1 | AAA | Lc 53.3 | Large or bold text, headings |
| #90A3B4 text on white | 2.59:1 | Fails | Lc 50.7 | Large or bold text, headings |
| #90A3B4 text on black | 8.08:1 | AAA | Lc -51.2 | 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
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E7EAEE
oklch(93.6% 0.006 255.5)
-
Step 200
200
#D3DAE0
oklch(88.5% 0.011 243.7)
-
Step 300
300
#B6C2CD
oklch(80.8% 0.02 245.7)
-
Step 400
400 (this color)
#90A3B4
oklch(70.6% 0.033 245.3)
-
Step 500
500
#758DA2
oklch(63.2% 0.042 244.9)
-
Step 600
600
#5D778D
oklch(55.7% 0.046 244.3)
-
Step 700
700
#4D6478
oklch(49.2% 0.042 245.1)
-
Step 800
800
#3F5161
oklch(42.6% 0.035 245.6)
-
Step 900
900
#36434F
oklch(37.6% 0.027 246.4)
-
Step 950
950
#20272F
oklch(26.9% 0.018 251.9)
#90A3B4 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) | #9CA3B5 | 0.016 |
| Deuteranopia (no green cones) | #989FB4 | 0.015 |
| Tritanopia (no blue cones) | #87A7A8 | 0.027 |
| Achromatopsia (no color) | #A1A1A1 | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #90A3B4
#90A3B4
oklch(70.6% 0.033 245.3)
- #AF9D8B
#AF9D8B
oklch(70.7% 0.033 67.2)
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 #90A3B4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluey Grey #89A0B0 ΔE 0.014
- Bluegrey #85A3B2 ΔE 0.015
- Cool Steel #97A7B3 ΔE 0.016
- Cool Grey #95A3A6 ΔE 0.021
- Cool Gray #8D99AE ΔE 0.028
- Greyblue #77A1B5 ΔE 0.032
- Pewter #96A8A1 ΔE 0.036
- Dark Gray #A9A9A9 ΔE 0.043
Use #90A3B4 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.