#91A5BB
Closest named color: Cool Steel (#97A7B3). oklch(71.4% 0.039 250.9), rgb(145, 165, 187).
Aa
Black text reads best on this color (8.30:1).
About this color
#91A5BB is a medium-light, muted blue. In OKLCH its lightness is 71%, its chroma 0.039 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Steel (#97A7B3), ΔE 0.016 away. Black text reads best on it, at 8.30:1.
| Hue family | Blues |
| Lightness | medium-light (71%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | Cool Steel (#97A7B3) |
| Black text | 8.30:1 |
| White text | 2.52:1 |
Values
| HEX | #91A5BB |
| RGB | rgb(145, 165, 187) |
| HSL | hsl(211, 24%, 65%) |
| OKLCH | oklch(71.4% 0.039 250.9) |
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 #91A5BB | 2.52:1 | Fails | Lc -54.7 | Large or bold text, headings |
| Black text on #91A5BB | 8.30:1 | AAA | Lc 54.4 | Large or bold text, headings |
| #91A5BB text on white | 2.52:1 | Fails | Lc 49.6 | Large or bold text, headings |
| #91A5BB text on black | 8.30:1 | AAA | Lc -52.4 | 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
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAEE
oklch(93.5% 0.007 247.9)
-
Step 200
200
#D3DAE2
oklch(88.5% 0.013 251.6)
-
Step 300
300
#B5C2D0
oklch(80.8% 0.024 250.1)
-
Step 400
400 (this color)
#91A5BB
oklch(71.4% 0.039 250.9)
-
Step 500
500
#738CA7
oklch(63% 0.05 250.6)
-
Step 600
600
#5B7693
oklch(55.6% 0.055 250.6)
-
Step 700
700
#4B637D
oklch(49.1% 0.051 250.9)
-
Step 800
800
#3E5166
oklch(42.8% 0.042 251.3)
-
Step 900
900
#354353
oklch(37.7% 0.033 252.1)
-
Step 950
950
#1F2730
oklch(26.9% 0.02 251.6)
#91A5BB 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) | #9DA5BC | 0.016 |
| Deuteranopia (no green cones) | #98A1BB | 0.014 |
| Tritanopia (no blue cones) | #86AAAC | 0.033 |
| Achromatopsia (no color) | #A3A3A3 | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #91A5BB
#91A5BB
oklch(71.4% 0.039 250.9)
- #B39F88
#B39F88
oklch(71.4% 0.04 71)
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 #91A5BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Steel #97A7B3 ΔE 0.016
- Bluegrey #85A3B2 ΔE 0.022
- Bluey Grey #89A0B0 ΔE 0.022
- Cool Grey #95A3A6 ΔE 0.030
- Cool Gray #8D99AE ΔE 0.035
- Greyblue #77A1B5 ΔE 0.036
- Pewter #96A8A1 ΔE 0.042
- Dark Gray #A9A9A9 ΔE 0.045
Use #91A5BB 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.