#8C91AA
Closest named color: Cool Gray (#8D99AE). oklch(66.1% 0.037 276.4), rgb(140, 145, 170).
Aa
Black text reads best on this color (6.74:1).
About this color
#8C91AA is a medium-light, muted blue. In OKLCH its lightness is 66%, its chroma 0.037 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Gray (#8D99AE), ΔE 0.022 away. Black text reads best on it, at 6.74:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | Cool Gray (#8D99AE) |
| Black text | 6.74:1 |
| White text | 3.11:1 |
Values
| HEX | #8C91AA |
| RGB | rgb(140, 145, 170) |
| HSL | hsl(230, 15%, 61%) |
| OKLCH | oklch(66.1% 0.037 276.4) |
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 #8C91AA | 3.11:1 | AA large text | Lc -63.5 | Content text, not long reading |
| Black text on #8C91AA | 6.74:1 | AA | Lc 45.9 | Large or bold text, headings |
| #8C91AA text on white | 3.11:1 | AA large text | Lc 58.1 | Large or bold text, headings |
| #8C91AA text on black | 6.74:1 | AA | Lc -43.6 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#E9EAED
oklch(93.7% 0.004 271.4)
-
Step 200
200
#D7D9E0
oklch(88.6% 0.01 273.3)
-
Step 300
300
#BDC0CD
oklch(80.9% 0.018 275.6)
-
Step 400
400
#9B9FB3
oklch(70.6% 0.029 276.6)
-
Step 500
500 (this color)
#8C91AA
oklch(66.1% 0.037 276.4)
-
Step 600
600
#6D728C
oklch(55.7% 0.041 276.5)
-
Step 700
700
#5B5F77
oklch(49.1% 0.039 277.5)
-
Step 800
800
#4A4E60
oklch(42.7% 0.03 275.2)
-
Step 900
900
#3E414F
oklch(37.8% 0.024 275.7)
-
Step 950
950
#24262E
oklch(27% 0.015 274.3)
#8C91AA 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) | #8A93AB | 0.006 |
| Deuteranopia (no green cones) | #8991A9 | 0.005 |
| Tritanopia (no blue cones) | #859599 | 0.033 |
| Achromatopsia (no color) | #929292 | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #8C91AA
#8C91AA
oklch(66.1% 0.037 276.4)
- #999379
#999379
oklch(66.1% 0.038 96.5)
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 #8C91AA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Gray #8D99AE ΔE 0.022
- Silver Lake Blue #778DA9 ΔE 0.032
- Blue Grey #758DA3 ΔE 0.036
- Bluey Grey #89A0B0 ΔE 0.040
- Light Slate Gray #778899 ΔE 0.046
- Greyblue #77A1B5 ΔE 0.047
- Bluegrey #85A3B2 ΔE 0.048
- Heather #A484AC ΔE 0.049
Use #8C91AA 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.