#537F84
Closest named color: Grey Blue (#647D8E). oklch(56.6% 0.049 204.9), rgb(83, 127, 132).
Aa
Black text reads best on this color (4.73:1).
About this color
#537F84 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 57%, its chroma 0.049 and its hue 205°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Blue (#647D8E), ΔE 0.029 away. Black text reads best on it, at 4.73:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 4.73:1 |
| White text | 4.43:1 |
Values
| HEX | #537F84 |
| RGB | rgb(83, 127, 132) |
| HSL | hsl(186, 23%, 42%) |
| OKLCH | oklch(56.6% 0.049 204.9) |
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 #537F84 | 4.43:1 | AA large text | Lc -76.2 | Fine for body text |
| Black text on #537F84 | 4.73:1 | AA | Lc 33.4 | Non-text elements, placeholder text |
| #537F84 text on white | 4.43:1 | AA large text | Lc 70.7 | Content text, not long reading |
| #537F84 text on black | 4.73:1 | AA | Lc -31.0 | 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
#D0DCDD
oklch(88.6% 0.013 202.9)
-
Step 300
300
#B1C5C7
oklch(80.9% 0.022 204)
-
Step 400
400
#88A7AB
oklch(70.6% 0.035 206)
-
Step 500
500
#699296
oklch(63.1% 0.045 203.6)
-
Step 600
600 (this color)
#537F84
oklch(56.6% 0.049 204.9)
-
Step 700
700
#40686D
oklch(49% 0.046 205.8)
-
Step 800
800
#355559
oklch(42.6% 0.038 205.8)
-
Step 900
900
#2F4649
oklch(37.6% 0.029 206.2)
-
Step 950
950
#1C292B
oklch(27% 0.018 207.9)
#537F84 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) | #787B84 | 0.048 |
| Deuteranopia (no green cones) | #707584 | 0.045 |
| Tritanopia (no blue cones) | #408280 | 0.022 |
| Achromatopsia (no color) | #787878 | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #537F84
#537F84
oklch(56.6% 0.049 204.9)
- #916B68
#916B68
oklch(56.5% 0.049 23.9)
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 #537F84, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.029
- Battleship Grey #6B7C85 ΔE 0.030
- Steel Grey #6F828A ΔE 0.038
- Battleship Gray #6C757D ΔE 0.039
- Slate Gray #708090 ΔE 0.043
- Stormy Blue #507B9C ΔE 0.043
- Metallic Blue #4F738E ΔE 0.045
- Cerulean #457B9D ΔE 0.046
Use #537F84 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.