#51797B
Closest named color: Battleship Gray (#6C757D). oklch(54.7% 0.045 199.9), rgb(81, 121, 123).
Aa
White text reads best on this color (4.80:1).
About this color
#51797B is a medium-dark, muted teal or cyan. In OKLCH its lightness is 55%, its chroma 0.045 and its hue 200°. Its hue sits on the cool side of the wheel. The nearest named color is Battleship Gray (#6C757D), ΔE 0.037 away. White text reads best on it, at 4.80:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (55%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Battleship Gray (#6C757D) |
| Black text | 4.37:1 |
| White text | 4.80:1 |
Values
| HEX | #51797B |
| RGB | rgb(81, 121, 123) |
| HSL | hsl(183, 21%, 40%) |
| OKLCH | oklch(54.7% 0.045 199.9) |
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 #51797B | 4.80:1 | AA | Lc -78.7 | Fine for body text |
| Black text on #51797B | 4.37:1 | AA large text | Lc 30.8 | Non-text elements, placeholder text |
| #51797B text on white | 4.80:1 | AA | Lc 73.3 | Content text, not long reading |
| #51797B text on black | 4.37:1 | AA large text | Lc -28.4 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E6EBEB
oklch(93.6% 0.005 197.1)
-
Step 200
200
#D1DBDC
oklch(88.4% 0.011 204.1)
-
Step 300
300
#B2C5C6
oklch(80.9% 0.021 200.6)
-
Step 400
400
#8AA7A8
oklch(70.7% 0.032 199)
-
Step 500
500
#6C9193
oklch(63% 0.041 200.3)
-
Step 600
600 (this color)
#51797B
oklch(54.7% 0.045 199.9)
-
Step 700
700
#44686A
oklch(49.1% 0.041 200.3)
-
Step 800
800
#385556
oklch(42.7% 0.035 198.7)
-
Step 900
900
#314647
oklch(37.7% 0.026 199.8)
-
Step 950
950
#1D292A
oklch(27% 0.017 202.6)
#51797B 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) | #74757B | 0.047 |
| Deuteranopia (no green cones) | #6C707B | 0.042 |
| Tritanopia (no blue cones) | #417C79 | 0.019 |
| Achromatopsia (no color) | #727272 | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51797B
#51797B
oklch(54.7% 0.045 199.9)
- #896766
#896766
oklch(54.8% 0.044 20.5)
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 #51797B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Battleship Gray #6C757D ΔE 0.037
- Battleship Grey #6B7C85 ΔE 0.039
- Metallic Blue #4F738E ΔE 0.040
- Grey Blue #647D8E ΔE 0.040
- Teal #008080 ΔE 0.048
- Deep Aqua #08787F ΔE 0.049
- Bluegreen #017A79 ΔE 0.051
- Stormy Blue #507B9C ΔE 0.051
Use #51797B 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.