#909BB4
Closest named color: Cool Gray (#8D99AE). oklch(68.9% 0.039 266.6), rgb(144, 155, 180).
Aa
Black text reads best on this color (7.53:1).
About this color
#909BB4 is a medium-light, muted blue. In OKLCH its lightness is 69%, its chroma 0.039 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Gray (#8D99AE), ΔE 0.011 away. Black text reads best on it, at 7.53:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | Cool Gray (#8D99AE) |
| Black text | 7.53:1 |
| White text | 2.78:1 |
Values
| HEX | #909BB4 |
| RGB | rgb(144, 155, 180) |
| HSL | hsl(222, 19%, 64%) |
| OKLCH | oklch(68.9% 0.039 266.6) |
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 #909BB4 | 2.78:1 | Fails | Lc -59.0 | Large or bold text, headings |
| Black text on #909BB4 | 7.53:1 | AAA | Lc 50.3 | Large or bold text, headings |
| #909BB4 text on white | 2.78:1 | Fails | Lc 53.7 | Large or bold text, headings |
| #909BB4 text on black | 7.53:1 | AAA | Lc -48.1 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E8EAEF
oklch(93.7% 0.007 268.5)
-
Step 200
200
#D5D9E2
oklch(88.5% 0.013 266.7)
-
Step 300
300
#B9C1D1
oklch(81% 0.024 264.4)
-
Step 400
400 (this color)
#909BB4
oklch(68.9% 0.039 266.6)
-
Step 500
500
#7C89A8
oklch(63.1% 0.049 267.1)
-
Step 600
600
#657394
oklch(55.7% 0.054 266.8)
-
Step 700
700
#54607E
oklch(49.1% 0.051 267.6)
-
Step 800
800
#444F66
oklch(42.7% 0.041 264.8)
-
Step 900
900
#3A4153
oklch(37.6% 0.032 268.2)
-
Step 950
950
#222631
oklch(27% 0.021 269.3)
#909BB4 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) | #949DB5 | 0.008 |
| Deuteranopia (no green cones) | #9099B3 | 0.005 |
| Tritanopia (no blue cones) | #87A0A3 | 0.035 |
| Achromatopsia (no color) | #9B9B9B | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #909BB4
#909BB4
oklch(68.9% 0.039 266.6)
- #A69A80
#A69A80
oklch(69% 0.039 86.2)
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 #909BB4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Gray #8D99AE ΔE 0.011
- Bluey Grey #89A0B0 ΔE 0.019
- Bluegrey #85A3B2 ΔE 0.026
- Greyblue #77A1B5 ΔE 0.034
- Cool Grey #95A3A6 ΔE 0.036
- Cool Steel #97A7B3 ΔE 0.036
- Pewter #96A8A1 ΔE 0.054
- Silver Lake Blue #778DA9 ΔE 0.055
Use #909BB4 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.