#537E81
Closest named color: Grey Blue (#647D8E). oklch(56.3% 0.048 201.4), rgb(83, 126, 129).
Aa
Black text reads best on this color (4.66:1).
About this color
#537E81 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 56%, its chroma 0.048 and its hue 201°. 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 4.66:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (56%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 4.66:1 |
| White text | 4.49:1 |
Values
| HEX | #537E81 |
| RGB | rgb(83, 126, 129) |
| HSL | hsl(184, 22%, 42%) |
| OKLCH | oklch(56.3% 0.048 201.4) |
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 #537E81 | 4.49:1 | AA large text | Lc -76.6 | Fine for body text |
| Black text on #537E81 | 4.66:1 | AA | Lc 32.9 | Non-text elements, placeholder text |
| #537E81 text on white | 4.49:1 | AA large text | Lc 71.2 | Content text, not long reading |
| #537E81 text on black | 4.66:1 | AA | Lc -30.5 | 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
#E5EBEB
oklch(93.6% 0.006 197)
-
Step 200
200
#D1DCDC
oklch(88.6% 0.012 196.9)
-
Step 300
300
#B1C5C6
oklch(80.9% 0.022 200.4)
-
Step 400
400
#88A7A9
oklch(70.6% 0.034 201.3)
-
Step 500
500
#6A9295
oklch(63.2% 0.044 201.9)
-
Step 600
600 (this color)
#537E81
oklch(56.3% 0.048 201.4)
-
Step 700
700
#41686B
oklch(49% 0.044 202)
-
Step 800
800
#365557
oklch(42.6% 0.037 201)
-
Step 900
900
#2F4648
oklch(37.6% 0.029 202.8)
-
Step 950
950
#1C292A
oklch(26.9% 0.018 202.1)
#537E81 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) | #787A81 | 0.049 |
| Deuteranopia (no green cones) | #707481 | 0.045 |
| Tritanopia (no blue cones) | #41817F | 0.020 |
| Achromatopsia (no color) | #777777 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #537E81
#537E81
oklch(56.3% 0.048 201.4)
- #8F6B69
#8F6B69
oklch(56.3% 0.046 22.3)
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 #537E81, 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 0.032
- Battleship Gray #6C757D ΔE 0.038
- Steel Grey #6F828A ΔE 0.041
- Metallic Blue #4F738E ΔE 0.045
- Slate Gray #708090 ΔE 0.046
- Stormy Blue #507B9C ΔE 0.046
- Cerulean #457B9D ΔE 0.049
Use #537E81 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.