#507C8B
Closest named color: Grey Blue (#647D8E). oklch(56% 0.054 221.5), rgb(80, 124, 139).
Aa
Black text reads best on this color (4.59:1).
About this color
#507C8B is a medium-dark, muted teal or cyan. In OKLCH its lightness is 56%, its chroma 0.054 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Blue (#647D8E), ΔE 0.025 away. Black text reads best on it, at 4.59:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (56%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 4.59:1 |
| White text | 4.56:1 |
Values
| HEX | #507C8B |
| RGB | rgb(80, 124, 139) |
| HSL | hsl(195, 27%, 43%) |
| OKLCH | oklch(56% 0.054 221.5) |
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 #507C8B | 4.56:1 | AA | Lc -77.1 | Fine for body text |
| Black text on #507C8B | 4.59:1 | AA | Lc 32.4 | Non-text elements, placeholder text |
| #507C8B text on white | 4.56:1 | AA | Lc 71.7 | Content text, not long reading |
| #507C8B text on black | 4.59:1 | AA | Lc -30.0 | 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
#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
#B1C5CC
oklch(81% 0.024 220.8)
-
Step 400
400
#87A7B2
oklch(70.8% 0.039 220.8)
-
Step 500
500
#68919F
oklch(63.2% 0.05 221.1)
-
Step 600
600 (this color)
#507C8B
oklch(56% 0.054 221.5)
-
Step 700
700
#3F6775
oklch(49% 0.05 222.3)
-
Step 800
800
#35545F
oklch(42.6% 0.041 222.4)
-
Step 900
900
#2E464E
oklch(37.8% 0.033 220.7)
-
Step 950
950
#1B292E
oklch(27% 0.021 222)
#507C8B 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) | #737A8C | 0.045 |
| Deuteranopia (no green cones) | #6A738B | 0.040 |
| Tritanopia (no blue cones) | #388181 | 0.034 |
| Achromatopsia (no color) | #767676 | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #507C8B
#507C8B
oklch(56% 0.054 221.5)
- #906A5C
#906A5C
oklch(55.9% 0.054 41.1)
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 #507C8B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.025
- Stormy Blue #507B9C ΔE 0.028
- Metallic Blue #4F738E ΔE 0.029
- Cerulean #457B9D ΔE 0.031
- Battleship Grey #6B7C85 ΔE 0.034
- Battleship Gray #6C757D ΔE 0.039
- Dull Blue #49759C ΔE 0.040
- Slate Gray #708090 ΔE 0.044
Use #507C8B 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.