#909FCB
Closest named color: Cool Gray (#8D99AE). oklch(70.7% 0.067 270), rgb(144, 159, 203).
Aa
Black text reads best on this color (8.00:1).
About this color
#909FCB is a medium-light, muted blue. In OKLCH its lightness is 71%, its chroma 0.067 and its hue 270°. 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 8.00:1.
| Hue family | Blues |
| Lightness | medium-light (71%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Cool Gray (#8D99AE) |
| Black text | 8.00:1 |
| White text | 2.62:1 |
Values
| HEX | #909FCB |
| RGB | rgb(144, 159, 203) |
| HSL | hsl(225, 36%, 68%) |
| OKLCH | oklch(70.7% 0.067 270) |
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 #909FCB | 2.62:1 | Fails | Lc -56.3 | Large or bold text, headings |
| Black text on #909FCB | 8.00:1 | AAA | Lc 52.9 | Large or bold text, headings |
| #909FCB text on white | 2.62:1 | Fails | Lc 51.1 | Large or bold text, headings |
| #909FCB text on black | 8.00:1 | AAA | Lc -50.8 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E6EAF2
oklch(93.6% 0.012 264.5)
-
Step 200
200
#D3D9E9
oklch(88.6% 0.023 269.4)
-
Step 300
300
#B6C0DC
oklch(80.9% 0.041 269.9)
-
Step 400
400 (this color)
#909FCB
oklch(70.7% 0.067 270)
-
Step 500
500
#7587BE
oklch(63.1% 0.086 269.9)
-
Step 600
600
#5E70AA
oklch(55.6% 0.093 270.1)
-
Step 700
700
#4E5E92
oklch(49.2% 0.086 270)
-
Step 800
800
#404D76
oklch(42.8% 0.07 269.9)
-
Step 900
900
#36405F
oklch(37.7% 0.055 269.9)
-
Step 950
950
#202638
oklch(27.1% 0.035 269.8)
#909FCB 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) | #91A3CD | 0.011 |
| Deuteranopia (no green cones) | #8D9ECA | 0.005 |
| Tritanopia (no blue cones) | #80A7AE | 0.059 |
| Achromatopsia (no color) | #A0A0A0 | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #909FCB
#909FCB
oklch(70.7% 0.067 270)
- #B19F70
#B19F70
oklch(70.7% 0.067 89.5)
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 #909FCB, 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 0.043
- Bluegrey #85A3B2 ΔE 0.045
- Cool Steel #97A7B3 ΔE 0.049
- Greyblue #77A1B5 ΔE 0.049
- Cool Grey #95A3A6 ΔE 0.060
- Pale Purple #B790D4 ΔE 0.070
- Dark Gray #A9A9A9 ΔE 0.073
Use #909FCB 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.