#909BCB
Closest named color: Cool Gray (#8D99AE). oklch(69.8% 0.072 274.4), rgb(144, 155, 203).
Aa
Black text reads best on this color (7.73:1).
About this color
#909BCB is a medium-light, moderately saturated blue. In OKLCH its lightness is 70%, its chroma 0.072 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Gray (#8D99AE), ΔE 0.043 away. Black text reads best on it, at 7.73:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Cool Gray (#8D99AE) |
| Black text | 7.73:1 |
| White text | 2.71:1 |
Values
| HEX | #909BCB |
| RGB | rgb(144, 155, 203) |
| HSL | hsl(229, 36%, 68%) |
| OKLCH | oklch(69.8% 0.072 274.4) |
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 #909BCB | 2.71:1 | Fails | Lc -57.8 | Large or bold text, headings |
| Black text on #909BCB | 7.73:1 | AAA | Lc 51.4 | Large or bold text, headings |
| #909BCB text on white | 2.71:1 | Fails | Lc 52.6 | Large or bold text, headings |
| #909BCB text on black | 7.73:1 | AAA | Lc -49.3 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E7E9F3
oklch(93.5% 0.014 277.1)
-
Step 200
200
#D4D8EA
oklch(88.5% 0.025 275.9)
-
Step 300
300
#B7BFDE
oklch(80.8% 0.045 273.9)
-
Step 400
400 (this color)
#909BCB
oklch(69.8% 0.072 274.4)
-
Step 500
500
#7885C1
oklch(63% 0.092 274.1)
-
Step 600
600
#626EAD
oklch(55.6% 0.099 274.5)
-
Step 700
700
#515C95
oklch(49.2% 0.092 274.2)
-
Step 800
800
#424B79
oklch(42.7% 0.077 274.3)
-
Step 900
900
#383F61
oklch(37.7% 0.059 274.4)
-
Step 950
950
#212539
oklch(27% 0.038 274.9)
#909BCB 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) | #8D9FCD | 0.011 |
| Deuteranopia (no green cones) | #899BCA | 0.010 |
| Tritanopia (no blue cones) | #81A4AB | 0.064 |
| Achromatopsia (no color) | #9D9D9D | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #909BCB
#909BCB
oklch(69.8% 0.072 274.4)
- #AC9E6A
#AC9E6A
oklch(69.9% 0.072 94.8)
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 #909BCB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Gray #8D99AE ΔE 0.043
- Bluey Grey #89A0B0 ΔE 0.048
- Bluegrey #85A3B2 ΔE 0.052
- Greyblue #77A1B5 ΔE 0.053
- Cool Steel #97A7B3 ΔE 0.057
- Pale Purple #B790D4 ΔE 0.065
- Perrywinkle #8F8CE7 ΔE 0.065
- Cool Grey #95A3A6 ΔE 0.066
Use #909BCB 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.