#909BBF
Closest named color: Cool Gray (#8D99AE). oklch(69.3% 0.054 271.6), rgb(144, 155, 191).
Aa
Black text reads best on this color (7.62:1).
About this color
#909BBF is a medium-light, muted blue. In OKLCH its lightness is 69%, its chroma 0.054 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Gray (#8D99AE), ΔE 0.025 away. Black text reads best on it, at 7.62:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Cool Gray (#8D99AE) |
| Black text | 7.62:1 |
| White text | 2.75:1 |
Values
| HEX | #909BBF |
| RGB | rgb(144, 155, 191) |
| HSL | hsl(226, 27%, 66%) |
| OKLCH | oklch(69.3% 0.054 271.6) |
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 #909BBF | 2.75:1 | Fails | Lc -58.4 | Large or bold text, headings |
| Black text on #909BBF | 7.62:1 | AAA | Lc 50.8 | Large or bold text, headings |
| #909BBF text on white | 2.75:1 | Fails | Lc 53.2 | Large or bold text, headings |
| #909BBF text on black | 7.62:1 | AAA | Lc -48.7 | 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
#E7EAF1
oklch(93.7% 0.01 267.4)
-
Step 200
200
#D4D9E6
oklch(88.5% 0.019 269.1)
-
Step 300
300
#B8C0D7
oklch(80.9% 0.034 270.4)
-
Step 400
400 (this color)
#909BBF
oklch(69.3% 0.054 271.6)
-
Step 500
500
#7A87B4
oklch(63% 0.07 271.8)
-
Step 600
600
#6371A0
oklch(55.6% 0.075 271.1)
-
Step 700
700
#525E89
oklch(49% 0.071 271.7)
-
Step 800
800
#434D6F
oklch(42.6% 0.058 271.2)
-
Step 900
900
#39405A
oklch(37.7% 0.046 272.4)
-
Step 950
950
#212635
oklch(27.1% 0.029 270.1)
#909BBF 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) | #909EC1 | 0.008 |
| Deuteranopia (no green cones) | #8D9ABE | 0.005 |
| Tritanopia (no blue cones) | #84A2A7 | 0.049 |
| Achromatopsia (no color) | #9C9C9C | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #909BBF
#909BBF
oklch(69.3% 0.054 271.6)
- #A99C76
#A99C76
oklch(69.4% 0.055 91.4)
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 #909BBF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Gray #8D99AE ΔE 0.025
- Bluey Grey #89A0B0 ΔE 0.032
- Bluegrey #85A3B2 ΔE 0.037
- Greyblue #77A1B5 ΔE 0.040
- Cool Steel #97A7B3 ΔE 0.044
- Cool Grey #95A3A6 ΔE 0.050
- Silver Lake Blue #778DA9 ΔE 0.059
- Heather #A484AC ΔE 0.063
Use #909BBF 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.