#508191
Closest named color: Grey Blue (#647D8E). oklch(57.5% 0.058 220.7), rgb(80, 129, 145).
Aa
Black text reads best on this color (4.89:1).
About this color
#508191 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 57%, its chroma 0.058 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Blue (#647D8E), ΔE 0.024 away. Black text reads best on it, at 4.89:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 4.89:1 |
| White text | 4.29:1 |
Values
| HEX | #508191 |
| RGB | rgb(80, 129, 145) |
| HSL | hsl(195, 29%, 44%) |
| OKLCH | oklch(57.5% 0.058 220.7) |
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 #508191 | 4.29:1 | AA large text | Lc -75.1 | Fine for body text |
| Black text on #508191 | 4.89:1 | AA | Lc 34.5 | Non-text elements, placeholder text |
| #508191 text on white | 4.29:1 | AA large text | Lc 69.6 | Content text, not long reading |
| #508191 text on black | 4.89:1 | AA | Lc -32.0 | 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
#CFDCE0
oklch(88.6% 0.015 218.1)
-
Step 300
300
#AFC5CD
oklch(80.9% 0.026 221.6)
-
Step 400
400
#84A7B3
oklch(70.6% 0.042 220.8)
-
Step 500
500
#6491A0
oklch(63% 0.054 220.7)
-
Step 600
600 (this color)
#508191
oklch(57.5% 0.058 220.7)
-
Step 700
700
#3B6876
oklch(49.1% 0.054 220)
-
Step 800
800
#325560
oklch(42.8% 0.044 220)
-
Step 900
900
#2C464F
oklch(37.7% 0.035 221.7)
-
Step 950
950
#1A292E
oklch(27% 0.022 220.6)
#508191 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) | #777E92 | 0.049 |
| Deuteranopia (no green cones) | #6D7791 | 0.043 |
| Tritanopia (no blue cones) | #338686 | 0.037 |
| Achromatopsia (no color) | #7A7A7A | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #508191
#508191
oklch(57.5% 0.058 220.7)
- #976D5E
#976D5E
oklch(57.4% 0.059 40.5)
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 #508191, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.024
- Stormy Blue #507B9C ΔE 0.029
- Cerulean #457B9D ΔE 0.032
- Battleship Grey #6B7C85 ΔE 0.035
- Steel Grey #6F828A ΔE 0.038
- Slate Gray #708090 ΔE 0.038
- Metallic Blue #4F738E ΔE 0.041
- Teal Blue #01889F ΔE 0.044
Use #508191 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.