#537378
Closest named color: Metallic Blue (#4F738E). oklch(53.3% 0.038 208.1), rgb(83, 115, 120).
Aa
White text reads best on this color (5.13:1).
About this color
#537378 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 53%, its chroma 0.038 and its hue 208°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.035 away. White text reads best on it, at 5.13:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (53%) |
| Chroma | muted (0.038) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.09:1 |
| White text | 5.13:1 |
Values
| HEX | #537378 |
| RGB | rgb(83, 115, 120) |
| HSL | hsl(188, 18%, 40%) |
| OKLCH | oklch(53.3% 0.038 208.1) |
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 #537378 | 5.13:1 | AA | Lc -80.7 | Fine for body text |
| Black text on #537378 | 4.09:1 | AA large text | Lc 28.7 | Dividers and decoration only |
| #537378 text on white | 5.13:1 | AA | Lc 75.4 | Fine for body text |
| #537378 text on black | 4.09:1 | AA large text | Lc -26.4 | 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
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E6EBEB
oklch(93.6% 0.005 197.1)
-
Step 200
200
#D2DBDC
oklch(88.5% 0.01 204.9)
-
Step 300
300
#B5C4C6
oklch(80.9% 0.017 206.4)
-
Step 400
400
#8EA6A9
oklch(70.8% 0.027 205.8)
-
Step 500
500
#729094
oklch(63.2% 0.034 206.3)
-
Step 600
600 (this color)
#537378
oklch(53.3% 0.038 208.1)
-
Step 700
700
#49676B
oklch(49.2% 0.036 206.4)
-
Step 800
800
#3C5457
oklch(42.8% 0.03 205.7)
-
Step 900
900
#344548
oklch(37.7% 0.022 209.5)
-
Step 950
950
#1E282A
oklch(26.8% 0.014 211.2)
#537378 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) | #6E7078 | 0.037 |
| Deuteranopia (no green cones) | #676B78 | 0.034 |
| Tritanopia (no blue cones) | #467674 | 0.019 |
| Achromatopsia (no color) | #6E6E6E | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #537378
#537378
oklch(53.3% 0.038 208.1)
- #816560
#816560
oklch(53.3% 0.037 30)
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 #537378, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.035
- Battleship Gray #6C757D ΔE 0.036
- Dim Gray #696969 ΔE 0.039
- Slate #516572 ΔE 0.042
- Battleship Grey #6B7C85 ΔE 0.046
- Grey Blue #647D8E ΔE 0.048
- Deep Aqua #08787F ΔE 0.051
- Bluegreen #017A79 ΔE 0.055
Use #537378 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.