#507A81
Closest named color: Metallic Blue (#4F738E). oklch(55.1% 0.048 209), rgb(80, 122, 129).
Aa
White text reads best on this color (4.72:1).
About this color
#507A81 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 55%, its chroma 0.048 and its hue 209°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.034 away. White text reads best on it, at 4.72:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (55%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.44:1 |
| White text | 4.72:1 |
Values
| HEX | #507A81 |
| RGB | rgb(80, 122, 129) |
| HSL | hsl(189, 23%, 41%) |
| OKLCH | oklch(55.1% 0.048 209) |
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 #507A81 | 4.72:1 | AA | Lc -78.2 | Fine for body text |
| Black text on #507A81 | 4.44:1 | AA large text | Lc 31.3 | Non-text elements, placeholder text |
| #507A81 text on white | 4.72:1 | AA | Lc 72.8 | Content text, not long reading |
| #507A81 text on black | 4.44:1 | AA large text | Lc -28.9 | 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
#E5EBEC
oklch(93.6% 0.007 208.8)
-
Step 200
200
#D1DBDD
oklch(88.4% 0.011 211)
-
Step 300
300
#B2C5C8
oklch(81% 0.021 208.1)
-
Step 400
400
#89A7AC
oklch(70.7% 0.034 208.8)
-
Step 500
500
#6A9198
oklch(63% 0.044 209.8)
-
Step 600
600 (this color)
#507A81
oklch(55.1% 0.048 209)
-
Step 700
700
#42686E
oklch(49.1% 0.044 208.4)
-
Step 800
800
#36555A
oklch(42.7% 0.037 208.6)
-
Step 900
900
#2F464A
oklch(37.7% 0.029 209.5)
-
Step 950
950
#1C292B
oklch(27% 0.018 207.9)
#507A81 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) | #737781 | 0.046 |
| Deuteranopia (no green cones) | #6B7181 | 0.042 |
| Tritanopia (no blue cones) | #3D7E7C | 0.025 |
| Achromatopsia (no color) | #737373 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #507A81
#507A81
oklch(55.1% 0.048 209)
- #8C6862
#8C6862
oklch(55.2% 0.048 29.4)
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 #507A81, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.034
- Grey Blue #647D8E ΔE 0.034
- Battleship Grey #6B7C85 ΔE 0.036
- Battleship Gray #6C757D ΔE 0.036
- Stormy Blue #507B9C ΔE 0.042
- Cerulean #457B9D ΔE 0.044
- Teal #008080 ΔE 0.049
- Steel Grey #6F828A ΔE 0.049
Use #507A81 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.