#537E91
Closest named color: Grey Blue (#647D8E). oklch(56.9% 0.056 227.6), rgb(83, 126, 145).
Aa
Black text reads best on this color (4.76:1).
About this color
#537E91 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 57%, its chroma 0.056 and its hue 228°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Blue (#647D8E), ΔE 0.020 away. Black text reads best on it, at 4.76:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 4.76:1 |
| White text | 4.41:1 |
Values
| HEX | #537E91 |
| RGB | rgb(83, 126, 145) |
| HSL | hsl(198, 27%, 45%) |
| OKLCH | oklch(56.9% 0.056 227.6) |
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 #537E91 | 4.41:1 | AA large text | Lc -76.0 | Fine for body text |
| Black text on #537E91 | 4.76:1 | AA | Lc 33.6 | Non-text elements, placeholder text |
| #537E91 text on white | 4.41:1 | AA large text | Lc 70.5 | Content text, not long reading |
| #537E91 text on black | 4.76:1 | AA | Lc -31.1 | Non-text elements, placeholder text |
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
#D0DBE0
oklch(88.5% 0.014 226.6)
-
Step 300
300
#B1C4CD
oklch(80.9% 0.024 227.8)
-
Step 400
400
#87A6B4
oklch(70.7% 0.04 227.1)
-
Step 500
500
#6890A2
oklch(63% 0.052 227.6)
-
Step 600
600 (this color)
#537E91
oklch(56.9% 0.056 227.6)
-
Step 700
700
#406778
oklch(49.2% 0.052 227.5)
-
Step 800
800
#355461
oklch(42.7% 0.042 226.3)
-
Step 900
900
#2E4550
oklch(37.6% 0.034 229.3)
-
Step 950
950
#1B292F
oklch(27.1% 0.022 226.4)
#537E91 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) | #747C92 | 0.042 |
| Deuteranopia (no green cones) | #6B7591 | 0.038 |
| Tritanopia (no blue cones) | #3A8484 | 0.040 |
| Achromatopsia (no color) | #787878 | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #537E91
#537E91
oklch(56.9% 0.056 227.6)
- #936D5B
#936D5B
oklch(56.8% 0.056 46.5)
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 #537E91, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.020
- Stormy Blue #507B9C ΔE 0.022
- Cerulean #457B9D ΔE 0.027
- Battleship Grey #6B7C85 ΔE 0.032
- Metallic Blue #4F738E ΔE 0.033
- Slate Gray #708090 ΔE 0.037
- Dull Blue #49759C ΔE 0.038
- Steel Grey #6F828A ΔE 0.039
Use #537E91 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.