#909CBB
Closest named color: Cool Gray (#8D99AE). oklch(69.4% 0.048 268.5), rgb(144, 156, 187).
Aa
Black text reads best on this color (7.65:1).
About this color
#909CBB is a medium-light, muted blue. In OKLCH its lightness is 69%, its chroma 0.048 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Gray (#8D99AE), ΔE 0.020 away. Black text reads best on it, at 7.65:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Cool Gray (#8D99AE) |
| Black text | 7.65:1 |
| White text | 2.74:1 |
Values
| HEX | #909CBB |
| RGB | rgb(144, 156, 187) |
| HSL | hsl(223, 24%, 65%) |
| OKLCH | oklch(69.4% 0.048 268.5) |
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 #909CBB | 2.74:1 | Fails | Lc -58.3 | Large or bold text, headings |
| Black text on #909CBB | 7.65:1 | AAA | Lc 51.0 | Large or bold text, headings |
| #909CBB text on white | 2.74:1 | Fails | Lc 53.0 | Large or bold text, headings |
| #909CBB text on black | 7.65:1 | AAA | Lc -48.8 | 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
#E7EAF0
oklch(93.6% 0.009 264.5)
-
Step 200
200
#D4D9E4
oklch(88.5% 0.016 266.3)
-
Step 300
300
#B8C0D5
oklch(80.8% 0.031 269.1)
-
Step 400
400 (this color)
#909CBB
oklch(69.4% 0.048 268.5)
-
Step 500
500
#7A88AF
oklch(63% 0.061 269.3)
-
Step 600
600
#63729B
oklch(55.6% 0.067 268.7)
-
Step 700
700
#525F84
oklch(49% 0.062 269.1)
-
Step 800
800
#434E6B
oklch(42.7% 0.05 268.2)
-
Step 900
900
#394157
oklch(37.7% 0.039 269)
-
Step 950
950
#212633
oklch(27% 0.025 268.3)
#909CBB 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) | #939EBC | 0.007 |
| Deuteranopia (no green cones) | #8F9ABA | 0.006 |
| Tritanopia (no blue cones) | #85A2A6 | 0.043 |
| Achromatopsia (no color) | #9C9C9C | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #909CBB
#909CBB
oklch(69.4% 0.048 268.5)
- #A99B7B
#A99B7B
oklch(69.3% 0.048 87.2)
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 #909CBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Gray #8D99AE ΔE 0.020
- Bluey Grey #89A0B0 ΔE 0.025
- Bluegrey #85A3B2 ΔE 0.030
- Greyblue #77A1B5 ΔE 0.036
- Cool Steel #97A7B3 ΔE 0.038
- Cool Grey #95A3A6 ΔE 0.042
- Silver Lake Blue #778DA9 ΔE 0.059
- Pewter #96A8A1 ΔE 0.060
Use #909CBB 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.