#909BB9
Closest named color: Cool Gray (#8D99AE). oklch(69.1% 0.046 269.3), rgb(144, 155, 185).
Aa
Black text reads best on this color (7.57:1).
About this color
#909BB9 is a medium-light, muted blue. In OKLCH its lightness is 69%, its chroma 0.046 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Gray (#8D99AE), ΔE 0.017 away. Black text reads best on it, at 7.57:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | Cool Gray (#8D99AE) |
| Black text | 7.57:1 |
| White text | 2.77:1 |
Values
| HEX | #909BB9 |
| RGB | rgb(144, 155, 185) |
| HSL | hsl(224, 23%, 65%) |
| OKLCH | oklch(69.1% 0.046 269.3) |
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 #909BB9 | 2.77:1 | Fails | Lc -58.7 | Large or bold text, headings |
| Black text on #909BB9 | 7.57:1 | AAA | Lc 50.6 | Large or bold text, headings |
| #909BB9 text on white | 2.77:1 | Fails | Lc 53.5 | Large or bold text, headings |
| #909BB9 text on black | 7.57:1 | AAA | Lc -48.4 | 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
#D5D9E4
oklch(88.5% 0.016 270)
-
Step 300
300
#B9C0D4
oklch(80.9% 0.029 270.3)
-
Step 400
400 (this color)
#909BB9
oklch(69.1% 0.046 269.3)
-
Step 500
500
#7B88AE
oklch(63% 0.059 270)
-
Step 600
600
#647299
oklch(55.6% 0.063 269)
-
Step 700
700
#535F83
oklch(49% 0.06 269.9)
-
Step 800
800
#444E6A
oklch(42.7% 0.048 269.1)
-
Step 900
900
#394156
oklch(37.7% 0.038 268.4)
-
Step 950
950
#222633
oklch(27.1% 0.025 271.4)
#909BB9 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) | #929DBA | 0.006 |
| Deuteranopia (no green cones) | #8F9AB8 | 0.003 |
| Tritanopia (no blue cones) | #86A1A5 | 0.042 |
| Achromatopsia (no color) | #9B9B9B | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #909BB9
#909BB9
oklch(69.1% 0.046 269.3)
- #A79B7C
#A79B7C
oklch(69.2% 0.046 89.4)
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 #909BB9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Gray #8D99AE ΔE 0.017
- Bluey Grey #89A0B0 ΔE 0.024
- Bluegrey #85A3B2 ΔE 0.030
- Greyblue #77A1B5 ΔE 0.036
- Cool Steel #97A7B3 ΔE 0.039
- Cool Grey #95A3A6 ΔE 0.042
- Silver Lake Blue #778DA9 ΔE 0.056
- Pewter #96A8A1 ΔE 0.059
Use #909BB9 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.