#537A91
Closest named color: Stormy Blue (#507B9C). oklch(56% 0.056 235), rgb(83, 122, 145).
Aa
White text reads best on this color (4.60:1).
About this color
#537A91 is a medium-dark, muted blue. In OKLCH its lightness is 56%, its chroma 0.056 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Stormy Blue (#507B9C), ΔE 0.017 away. White text reads best on it, at 4.60:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Stormy Blue (#507B9C) |
| Black text | 4.56:1 |
| White text | 4.60:1 |
Values
| HEX | #537A91 |
| RGB | rgb(83, 122, 145) |
| HSL | hsl(202, 27%, 45%) |
| OKLCH | oklch(56% 0.056 235) |
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 #537A91 | 4.60:1 | AA | Lc -77.4 | Fine for body text |
| Black text on #537A91 | 4.56:1 | AA | Lc 32.2 | Non-text elements, placeholder text |
| #537A91 text on white | 4.60:1 | AA | Lc 71.9 | Content text, not long reading |
| #537A91 text on black | 4.56:1 | AA | Lc -29.8 | Dividers and decoration only |
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 600.
-
Step 50
50
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBEE
oklch(93.6% 0.008 228.9)
-
Step 200
200
#D1DBE1
oklch(88.6% 0.014 233.8)
-
Step 300
300
#B2C4CF
oklch(81% 0.025 234.5)
-
Step 400
400
#89A5B7
oklch(70.7% 0.041 236.4)
-
Step 500
500
#6B8FA5
oklch(63.1% 0.052 235.5)
-
Step 600
600 (this color)
#537A91
oklch(56% 0.056 235)
-
Step 700
700
#42667A
oklch(49.1% 0.052 233.6)
-
Step 800
800
#375364
oklch(42.7% 0.044 235.9)
-
Step 900
900
#304551
oklch(37.8% 0.033 233.9)
-
Step 950
950
#1C2830
oklch(26.9% 0.022 237.9)
#537A91 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) | #6F7992 | 0.036 |
| Deuteranopia (no green cones) | #677291 | 0.033 |
| Tritanopia (no blue cones) | #3B8081 | 0.043 |
| Achromatopsia (no color) | #757575 | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #537A91
#537A91
oklch(56% 0.056 235)
- #8F6C54
#8F6C54
oklch(56% 0.057 55.7)
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 #537A91, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Stormy Blue #507B9C ΔE 0.017
- Metallic Blue #4F738E ΔE 0.022
- Cerulean #457B9D ΔE 0.022
- Grey Blue #647D8E ΔE 0.024
- Dull Blue #49759C ΔE 0.028
- Battleship Grey #6B7C85 ΔE 0.036
- Battleship Gray #6C757D ΔE 0.040
- Slate Gray #708090 ΔE 0.043
Use #537A91 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.