#909FBB
Closest named color: Bluey Grey (#89A0B0). oklch(70% 0.045 262.9), rgb(144, 159, 187).
Aa
Black text reads best on this color (7.86:1).
About this color
#909FBB is a medium-light, muted blue. In OKLCH its lightness is 70%, its chroma 0.045 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Bluey Grey (#89A0B0), ΔE 0.021 away. Black text reads best on it, at 7.86:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Bluey Grey (#89A0B0) |
| Black text | 7.86:1 |
| White text | 2.67:1 |
Values
| HEX | #909FBB |
| RGB | rgb(144, 159, 187) |
| HSL | hsl(219, 24%, 65%) |
| OKLCH | oklch(70% 0.045 262.9) |
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 #909FBB | 2.67:1 | Fails | Lc -57.1 | Large or bold text, headings |
| Black text on #909FBB | 7.86:1 | AAA | Lc 52.1 | Large or bold text, headings |
| #909FBB text on white | 2.67:1 | Fails | Lc 51.9 | Large or bold text, headings |
| #909FBB text on black | 7.86:1 | AAA | Lc -50.0 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E7EAEF
oklch(93.6% 0.007 260.7)
-
Step 200
200
#D4D9E4
oklch(88.5% 0.016 266.3)
-
Step 300
300
#B7C1D3
oklch(80.9% 0.028 262.3)
-
Step 400
400 (this color)
#909FBB
oklch(70% 0.045 262.9)
-
Step 500
500
#778AAD
oklch(63.1% 0.057 262.5)
-
Step 600
600
#607398
oklch(55.5% 0.062 263.4)
-
Step 700
700
#4F6182
oklch(49.1% 0.058 262.3)
-
Step 800
800
#414F6A
oklch(42.7% 0.049 263.2)
-
Step 900
900
#374256
oklch(37.8% 0.037 262.2)
-
Step 950
950
#202732
oklch(27.1% 0.023 259.3)
#909FBB 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) | #96A0BC | 0.009 |
| Deuteranopia (no green cones) | #929DBA | 0.006 |
| Tritanopia (no blue cones) | #85A5A8 | 0.041 |
| Achromatopsia (no color) | #9E9E9E | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #909FBB
#909FBB
oklch(70% 0.045 262.9)
- #AC9D7F
#AC9D7F
oklch(70.1% 0.045 84.5)
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 #909FBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluey Grey #89A0B0 ΔE 0.021
- Cool Gray #8D99AE ΔE 0.023
- Bluegrey #85A3B2 ΔE 0.025
- Cool Steel #97A7B3 ΔE 0.030
- Greyblue #77A1B5 ΔE 0.034
- Cool Grey #95A3A6 ΔE 0.037
- Pewter #96A8A1 ΔE 0.053
- Dark Gray #A9A9A9 ΔE 0.056
Use #909FBB 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.