#537B78
Closest named color: Battleship Gray (#6C757D). oklch(55.2% 0.045 190), rgb(83, 123, 120).
Aa
White text reads best on this color (4.69:1).
About this color
#537B78 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 55%, its chroma 0.045 and its hue 190°. Its hue sits on the cool side of the wheel. The nearest named color is Battleship Gray (#6C757D), ΔE 0.038 away. White text reads best on it, at 4.69:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (55%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Battleship Gray (#6C757D) |
| Black text | 4.47:1 |
| White text | 4.69:1 |
Values
| HEX | #537B78 |
| RGB | rgb(83, 123, 120) |
| HSL | hsl(176, 19%, 40%) |
| OKLCH | oklch(55.2% 0.045 190) |
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 #537B78 | 4.69:1 | AA | Lc -78.0 | Fine for body text |
| Black text on #537B78 | 4.47:1 | AA large text | Lc 31.5 | Non-text elements, placeholder text |
| #537B78 text on white | 4.69:1 | AA | Lc 72.6 | Content text, not long reading |
| #537B78 text on black | 4.47:1 | AA large text | Lc -29.1 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E6EBEB
oklch(93.6% 0.005 197.1)
-
Step 200
200
#D1DCDB
oklch(88.6% 0.012 190.4)
-
Step 300
300
#B3C5C3
oklch(80.9% 0.02 188.7)
-
Step 400
400
#8AA7A5
oklch(70.6% 0.032 191.3)
-
Step 500
500
#6D928F
oklch(63.2% 0.041 190)
-
Step 600
600 (this color)
#537B78
oklch(55.2% 0.045 190)
-
Step 700
700
#446966
oklch(49.2% 0.042 189.4)
-
Step 800
800
#385553
oklch(42.6% 0.035 190.5)
-
Step 900
900
#314645
oklch(37.6% 0.026 192.4)
-
Step 950
950
#1D2928
oklch(26.9% 0.017 189.9)
#537B78 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) | #777778 | 0.048 |
| Deuteranopia (no green cones) | #6F7178 | 0.045 |
| Tritanopia (no blue cones) | #457D7A | 0.015 |
| Achromatopsia (no color) | #747474 | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #537B78
#537B78
oklch(55.2% 0.045 190)
- #8A686C
#8A686C
oklch(55.3% 0.044 10.7)
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 #537B78, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Battleship Gray #6C757D ΔE 0.038
- Battleship Grey #6B7C85 ΔE 0.039
- Grey Blue #647D8E ΔE 0.042
- Metallic Blue #4F738E ΔE 0.049
- Teal #008080 ΔE 0.049
- Steel Grey #6F828A ΔE 0.050
- Bluegreen #017A79 ΔE 0.053
- Deep Aqua #08787F ΔE 0.054
Use #537B78 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.