#90A7BB
Closest named color: Cool Steel (#97A7B3). oklch(71.7% 0.039 244.6), rgb(144, 167, 187).
Aa
Black text reads best on this color (8.43:1).
About this color
#90A7BB is a medium-light, muted blue. In OKLCH its lightness is 72%, its chroma 0.039 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Steel (#97A7B3), ΔE 0.014 away. Black text reads best on it, at 8.43:1.
| Hue family | Blues |
| Lightness | medium-light (72%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | Cool Steel (#97A7B3) |
| Black text | 8.43:1 |
| White text | 2.49:1 |
Values
| HEX | #90A7BB |
| RGB | rgb(144, 167, 187) |
| HSL | hsl(208, 24%, 65%) |
| OKLCH | oklch(71.7% 0.039 244.6) |
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 #90A7BB | 2.49:1 | Fails | Lc -54.0 | Large or bold text, headings |
| Black text on #90A7BB | 8.43:1 | AAA | Lc 55.1 | Large or bold text, headings |
| #90A7BB text on white | 2.49:1 | Fails | Lc 48.9 | Large or bold text, headings |
| #90A7BB text on black | 8.43:1 | AAA | Lc -53.0 | 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
#E6EAEE
oklch(93.5% 0.007 247.9)
-
Step 200
200
#D2DAE2
oklch(88.5% 0.014 248)
-
Step 300
300
#B4C3D0
oklch(81% 0.025 244.2)
-
Step 400
400 (this color)
#90A7BB
oklch(71.7% 0.039 244.6)
-
Step 500
500
#708DA6
oklch(63% 0.05 244.7)
-
Step 600
600
#587791
oklch(55.6% 0.054 244.3)
-
Step 700
700
#48647C
oklch(49.1% 0.051 245)
-
Step 800
800
#3B5265
oklch(42.8% 0.042 243.9)
-
Step 900
900
#334452
oklch(37.8% 0.032 243.6)
-
Step 950
950
#1E2830
oklch(27.1% 0.02 242.7)
#90A7BB 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) | #9FA7BC | 0.020 |
| Deuteranopia (no green cones) | #9AA2BB | 0.018 |
| Tritanopia (no blue cones) | #84ACAD | 0.033 |
| Achromatopsia (no color) | #A4A4A4 | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #90A7BB
#90A7BB
oklch(71.7% 0.039 244.6)
- #B69F8B
#B69F8B
oklch(71.7% 0.039 63.2)
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 #90A7BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Steel #97A7B3 ΔE 0.014
- Bluegrey #85A3B2 ΔE 0.022
- Bluey Grey #89A0B0 ΔE 0.025
- Cool Grey #95A3A6 ΔE 0.029
- Greyblue #77A1B5 ΔE 0.038
- Cool Gray #8D99AE ΔE 0.039
- Pewter #96A8A1 ΔE 0.039
- Dark Gray #A9A9A9 ΔE 0.043
Use #90A7BB 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.