#91ACC4
Closest named color: Cool Steel (#97A7B3). oklch(73.2% 0.046 245.3), rgb(145, 172, 196).
Aa
Black text reads best on this color (8.90:1).
About this color
#91ACC4 is a medium-light, muted blue. In OKLCH its lightness is 73%, its chroma 0.046 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Steel (#97A7B3), ΔE 0.024 away. Black text reads best on it, at 8.90:1.
| Hue family | Blues |
| Lightness | medium-light (73%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | Cool Steel (#97A7B3) |
| Black text | 8.90:1 |
| White text | 2.35:1 |
Values
| HEX | #91ACC4 |
| RGB | rgb(145, 172, 196) |
| HSL | hsl(208, 30%, 67%) |
| OKLCH | oklch(73.2% 0.046 245.3) |
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 #91ACC4 | 2.35:1 | Fails | Lc -51.4 | Large or bold text, headings |
| Black text on #91ACC4 | 8.90:1 | AAA | Lc 57.5 | Large or bold text, headings |
| #91ACC4 text on white | 2.35:1 | Fails | Lc 46.5 | Large or bold text, headings |
| #91ACC4 text on black | 8.90:1 | AAA | Lc -55.6 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EAEF
oklch(93.5% 0.009 247.9)
-
Step 200
200
#D1DAE3
oklch(88.4% 0.016 248)
-
Step 300
300
#B2C3D2
oklch(80.9% 0.028 244.8)
-
Step 400
400 (this color)
#91ACC4
oklch(73.2% 0.046 245.3)
-
Step 500
500
#6C8EAB
oklch(63.2% 0.058 244.6)
-
Step 600
600
#537797
oklch(55.5% 0.065 246.1)
-
Step 700
700
#446481
oklch(49.1% 0.06 246.7)
-
Step 800
800
#385268
oklch(42.7% 0.048 244.8)
-
Step 900
900
#304455
oklch(37.7% 0.039 244.7)
-
Step 950
950
#1D2832
oklch(27.1% 0.024 246.3)
#91ACC4 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) | #A3ACC5 | 0.024 |
| Deuteranopia (no green cones) | #9CA6C4 | 0.021 |
| Tritanopia (no blue cones) | #83B2B4 | 0.038 |
| Achromatopsia (no color) | #A9A9A9 | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #91ACC4
#91ACC4
oklch(73.2% 0.046 245.3)
- #BDA38A
#BDA38A
oklch(73.2% 0.046 65.9)
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 #91ACC4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Steel #97A7B3 ΔE 0.024
- Bluegrey #85A3B2 ΔE 0.037
- Bluey Grey #89A0B0 ΔE 0.041
- Cool Grey #95A3A6 ΔE 0.043
- Dark Gray #A9A9A9 ΔE 0.046
- Light Grey Blue #9DBCD4 ΔE 0.048
- Pewter #96A8A1 ΔE 0.049
- French Gray #ADB5BD ΔE 0.049
Use #91ACC4 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.