#909BA3
Closest named color: Cool Gray (#8D99AE). oklch(68.3% 0.017 239.2), rgb(144, 155, 163).
Aa
Black text reads best on this color (7.40:1).
About this color
#909BA3 is a medium-light close to neutral grey. In OKLCH its lightness is 68%, its chroma 0.017. It has too little chroma to lean warm or cool. The nearest named color is Cool Gray (#8D99AE), ΔE 0.019 away. Black text reads best on it, at 7.40:1.
| Hue family | Neutrals |
| Lightness | medium-light (68%) |
| Chroma | close to neutral grey (0.017) |
| Temperature | neutral |
| Nearest name | Cool Gray (#8D99AE) |
| Black text | 7.40:1 |
| White text | 2.83:1 |
Values
| HEX | #909BA3 |
| RGB | rgb(144, 155, 163) |
| HSL | hsl(205, 9%, 60%) |
| OKLCH | oklch(68.3% 0.017 239.2) |
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 #909BA3 | 2.83:1 | Fails | Lc -59.7 | Large or bold text, headings |
| Black text on #909BA3 | 7.40:1 | AAA | Lc 49.6 | Large or bold text, headings |
| #909BA3 text on white | 2.83:1 | Fails | Lc 54.4 | Large or bold text, headings |
| #909BA3 text on black | 7.40:1 | AAA | Lc -47.4 | 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
#F4F5F6
oklch(97% 0.002 247.8)
-
Step 100
100
#E8EAEC
oklch(93.6% 0.003 247.9)
-
Step 200
200
#D6DADD
oklch(88.6% 0.006 239.8)
-
Step 300
300
#BBC2C7
oklch(81% 0.01 238.5)
-
Step 400
400 (this color)
#909BA3
oklch(68.3% 0.017 239.2)
-
Step 500
500
#7E8C96
oklch(63.2% 0.022 238.9)
-
Step 600
600
#677680
oklch(55.7% 0.024 237.1)
-
Step 700
700
#56636C
oklch(49.2% 0.022 238.2)
-
Step 800
800
#465158
oklch(42.8% 0.018 235.8)
-
Step 900
900
#3B4349
oklch(37.8% 0.015 240.3)
-
Step 950
950
#23272A
oklch(27% 0.008 240.2)
#909BA3 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) | #989BA3 | 0.011 |
| Deuteranopia (no green cones) | #9598A3 | 0.010 |
| Tritanopia (no blue cones) | #8B9D9D | 0.014 |
| Achromatopsia (no color) | #999999 | 0.017 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #909BA3
#909BA3
oklch(68.3% 0.017 239.2)
- #A2978F
#A2978F
oklch(68.4% 0.017 58.5)
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 #909BA3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Gray #8D99AE ΔE 0.019
- Bluey Grey #89A0B0 ΔE 0.020
- Cool Grey #95A3A6 ΔE 0.024
- Bluegrey #85A3B2 ΔE 0.027
- Cool Steel #97A7B3 ΔE 0.037
- Greyblue #77A1B5 ΔE 0.037
- Pewter #96A8A1 ΔE 0.040
- Cement #A5A391 ΔE 0.049
Use #909BA3 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.