#91AACC
Closest named color: Cool Steel (#97A7B3). oklch(73.1% 0.057 256.2), rgb(145, 170, 204).
Aa
Black text reads best on this color (8.82:1).
About this color
#91AACC is a medium-light, muted blue. In OKLCH its lightness is 73%, its chroma 0.057 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Steel (#97A7B3), ΔE 0.035 away. Black text reads best on it, at 8.82:1.
| Hue family | Blues |
| Lightness | medium-light (73%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | Cool Steel (#97A7B3) |
| Black text | 8.82:1 |
| White text | 2.37:1 |
Values
| HEX | #91AACC |
| RGB | rgb(145, 170, 204) |
| HSL | hsl(215, 37%, 68%) |
| OKLCH | oklch(73.1% 0.057 256.2) |
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 #91AACC | 2.37:1 | Fails | Lc -51.8 | Large or bold text, headings |
| Black text on #91AACC | 8.82:1 | AAA | Lc 57.1 | Large or bold text, headings |
| #91AACC text on white | 2.37:1 | Fails | Lc 46.9 | Large or bold text, headings |
| #91AACC text on black | 8.82:1 | AAA | Lc -55.2 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF1
oklch(93.5% 0.011 256.7)
-
Step 200
200
#D1DAE6
oklch(88.5% 0.019 255.5)
-
Step 300
300
#B2C2D8
oklch(80.9% 0.036 256.4)
-
Step 400
400 (this color)
#91AACC
oklch(73.1% 0.057 256.2)
-
Step 500
500
#6D8BB5
oklch(63% 0.072 256.9)
-
Step 600
600
#5475A1
oklch(55.6% 0.079 255.9)
-
Step 700
700
#45628A
oklch(49.1% 0.073 256.6)
-
Step 800
800
#395070
oklch(42.7% 0.061 256.8)
-
Step 900
900
#31435B
oklch(37.8% 0.047 255.8)
-
Step 950
950
#1D2735
oklch(27% 0.03 256.9)
#91AACC 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) | #9EABCE | 0.018 |
| Deuteranopia (no green cones) | #98A5CB | 0.015 |
| Tritanopia (no blue cones) | #80B1B5 | 0.050 |
| Achromatopsia (no color) | #A8A8A8 | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #91AACC
#91AACC
oklch(73.1% 0.057 256.2)
- #BDA480
#BDA480
oklch(73.2% 0.057 76.7)
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 #91AACC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Steel #97A7B3 ΔE 0.035
- Bluegrey #85A3B2 ΔE 0.043
- Bluey Grey #89A0B0 ΔE 0.046
- Light Grey Blue #9DBCD4 ΔE 0.052
- Greyblue #77A1B5 ΔE 0.052
- Cool Grey #95A3A6 ΔE 0.053
- Cool Gray #8D99AE ΔE 0.056
- Dark Gray #A9A9A9 ΔE 0.057
Use #91AACC 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.