#537E8A
Closest named color: Grey Blue (#647D8E). oklch(56.6% 0.051 217.2), rgb(83, 126, 138).
Aa
Black text reads best on this color (4.71:1).
About this color
#537E8A is a medium-dark, muted teal or cyan. In OKLCH its lightness is 57%, its chroma 0.051 and its hue 217°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Blue (#647D8E), ΔE 0.022 away. Black text reads best on it, at 4.71:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 4.71:1 |
| White text | 4.44:1 |
Values
| HEX | #537E8A |
| RGB | rgb(83, 126, 138) |
| HSL | hsl(193, 25%, 43%) |
| OKLCH | oklch(56.6% 0.051 217.2) |
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 #537E8A | 4.44:1 | AA large text | Lc -76.3 | Fine for body text |
| Black text on #537E8A | 4.71:1 | AA | Lc 33.3 | Non-text elements, placeholder text |
| #537E8A text on white | 4.44:1 | AA large text | Lc 70.8 | Content text, not long reading |
| #537E8A text on black | 4.71:1 | AA | Lc -30.9 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBED
oklch(93.6% 0.007 219.6)
-
Step 200
200
#D0DBDF
oklch(88.4% 0.013 221.4)
-
Step 300
300
#B1C5CA
oklch(81% 0.023 214.4)
-
Step 400
400
#88A7B0
oklch(70.8% 0.037 217.3)
-
Step 500
500
#69919C
oklch(63.1% 0.047 216.6)
-
Step 600
600 (this color)
#537E8A
oklch(56.6% 0.051 217.2)
-
Step 700
700
#416872
oklch(49.2% 0.047 215.8)
-
Step 800
800
#36545D
oklch(42.6% 0.038 218.7)
-
Step 900
900
#2F464C
oklch(37.8% 0.03 215.8)
-
Step 950
950
#1C292D
oklch(27.1% 0.019 218.7)
#537E8A 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) | #767B8B | 0.045 |
| Deuteranopia (no green cones) | #6D758A | 0.040 |
| Tritanopia (no blue cones) | #3D8282 | 0.030 |
| Achromatopsia (no color) | #777777 | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #537E8A
#537E8A
oklch(56.6% 0.051 217.2)
- #916C61
#916C61
oklch(56.5% 0.051 37.2)
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 #537E8A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.022
- Battleship Grey #6B7C85 ΔE 0.029
- Stormy Blue #507B9C ΔE 0.032
- Cerulean #457B9D ΔE 0.036
- Metallic Blue #4F738E ΔE 0.037
- Battleship Gray #6C757D ΔE 0.038
- Steel Grey #6F828A ΔE 0.038
- Slate Gray #708090 ΔE 0.039
Use #537E8A 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.