#91A3BF
Closest named color: Cool Steel (#97A7B3). oklch(71.1% 0.046 259.2), rgb(145, 163, 191).
Aa
Black text reads best on this color (8.19:1).
About this color
#91A3BF is a medium-light, muted blue. In OKLCH its lightness is 71%, its chroma 0.046 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Steel (#97A7B3), ΔE 0.025 away. Black text reads best on it, at 8.19:1.
| Hue family | Blues |
| Lightness | medium-light (71%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | Cool Steel (#97A7B3) |
| Black text | 8.19:1 |
| White text | 2.56:1 |
Values
| HEX | #91A3BF |
| RGB | rgb(145, 163, 191) |
| HSL | hsl(217, 26%, 66%) |
| OKLCH | oklch(71.1% 0.046 259.2) |
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 #91A3BF | 2.56:1 | Fails | Lc -55.3 | Large or bold text, headings |
| Black text on #91A3BF | 8.19:1 | AAA | Lc 53.9 | Large or bold text, headings |
| #91A3BF text on white | 2.56:1 | Fails | Lc 50.2 | Large or bold text, headings |
| #91A3BF text on black | 8.19:1 | AAA | Lc -51.8 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E7EAEF
oklch(93.6% 0.007 260.7)
-
Step 200
200
#D3DAE4
oklch(88.6% 0.016 257.2)
-
Step 300
300
#B6C1D4
oklch(80.8% 0.029 261.5)
-
Step 400
400 (this color)
#91A3BF
oklch(71.1% 0.046 259.2)
-
Step 500
500
#748BAD
oklch(63.1% 0.058 258)
-
Step 600
600
#5D7499
oklch(55.5% 0.064 259.7)
-
Step 700
700
#4C6283
oklch(49.2% 0.06 258.3)
-
Step 800
800
#3F506A
oklch(42.8% 0.048 258.7)
-
Step 900
900
#354256
oklch(37.6% 0.038 258.9)
-
Step 950
950
#1F2732
oklch(27% 0.024 256.4)
#91A3BF 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) | #9AA4C0 | 0.013 |
| Deuteranopia (no green cones) | #95A0BE | 0.009 |
| Tritanopia (no blue cones) | #85A9AC | 0.041 |
| Achromatopsia (no color) | #A2A2A2 | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #91A3BF
#91A3BF
oklch(71.1% 0.046 259.2)
- #B19F82
#B19F82
oklch(71.1% 0.046 79.6)
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 #91A3BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Steel #97A7B3 ΔE 0.025
- Bluey Grey #89A0B0 ΔE 0.025
- Bluegrey #85A3B2 ΔE 0.026
- Cool Gray #8D99AE ΔE 0.033
- Cool Grey #95A3A6 ΔE 0.037
- Greyblue #77A1B5 ΔE 0.037
- Pewter #96A8A1 ΔE 0.051
- Dark Gray #A9A9A9 ΔE 0.052
Use #91A3BF 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.