#537D81
Closest named color: Grey Blue (#647D8E). oklch(56% 0.047 203.5), rgb(83, 125, 129).
Aa
Black text reads best on this color (4.61:1).
About this color
#537D81 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 56%, its chroma 0.047 and its hue 203°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Blue (#647D8E), ΔE 0.031 away. Black text reads best on it, at 4.61:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (56%) |
| Chroma | muted (0.047) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 4.61:1 |
| White text | 4.54:1 |
Values
| HEX | #537D81 |
| RGB | rgb(83, 125, 129) |
| HSL | hsl(185, 22%, 42%) |
| OKLCH | oklch(56% 0.047 203.5) |
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 #537D81 | 4.54:1 | AA | Lc -77.0 | Fine for body text |
| Black text on #537D81 | 4.61:1 | AA | Lc 32.6 | Non-text elements, placeholder text |
| #537D81 text on white | 4.54:1 | AA | Lc 71.5 | Content text, not long reading |
| #537D81 text on black | 4.61:1 | AA | Lc -30.1 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E5EBEC
oklch(93.6% 0.007 208.8)
-
Step 200
200
#D1DBDC
oklch(88.4% 0.011 204.1)
-
Step 300
300
#B2C5C7
oklch(81% 0.021 204.4)
-
Step 400
400
#89A7AA
oklch(70.7% 0.033 203.9)
-
Step 500
500
#6B9295
oklch(63.2% 0.043 202.1)
-
Step 600
600 (this color)
#537D81
oklch(56% 0.047 203.5)
-
Step 700
700
#42686C
oklch(49% 0.044 204.3)
-
Step 800
800
#375558
oklch(42.7% 0.036 203.8)
-
Step 900
900
#304648
oklch(37.7% 0.028 203.1)
-
Step 950
950
#1C292A
oklch(26.9% 0.018 202.1)
#537D81 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) | #777A81 | 0.047 |
| Deuteranopia (no green cones) | #6F7381 | 0.044 |
| Tritanopia (no blue cones) | #41807E | 0.021 |
| Achromatopsia (no color) | #767676 | 0.047 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #537D81
#537D81
oklch(56% 0.047 203.5)
- #8E6A67
#8E6A67
oklch(56% 0.047 24.1)
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 #537D81, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.031
- Battleship Grey #6B7C85 ΔE 0.031
- Battleship Gray #6C757D ΔE 0.036
- Steel Grey #6F828A ΔE 0.042
- Metallic Blue #4F738E ΔE 0.042
- Stormy Blue #507B9C ΔE 0.045
- Slate Gray #708090 ΔE 0.046
- Cerulean #457B9D ΔE 0.048
Use #537D81 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.