#51797F
Closest named color: Metallic Blue (#4F738E). oklch(54.9% 0.046 207.7), rgb(81, 121, 127).
Aa
White text reads best on this color (4.78:1).
About this color
#51797F is a medium-dark, muted teal or cyan. In OKLCH its lightness is 55%, its chroma 0.046 and its hue 208°. 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 4.78:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (55%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.39:1 |
| White text | 4.78:1 |
Values
| HEX | #51797F |
| RGB | rgb(81, 121, 127) |
| HSL | hsl(188, 22%, 41%) |
| OKLCH | oklch(54.9% 0.046 207.7) |
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 #51797F | 4.78:1 | AA | Lc -78.6 | Fine for body text |
| Black text on #51797F | 4.39:1 | AA large text | Lc 30.9 | Non-text elements, placeholder text |
| #51797F text on white | 4.78:1 | AA | Lc 73.1 | Content text, not long reading |
| #51797F text on black | 4.39:1 | AA large text | Lc -28.6 | 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
#E6EBEC
oklch(93.7% 0.006 211)
-
Step 200
200
#D1DBDD
oklch(88.4% 0.011 211)
-
Step 300
300
#B2C5C7
oklch(81% 0.021 204.4)
-
Step 400
400
#8AA7AB
oklch(70.8% 0.033 206.7)
-
Step 500
500
#6C9197
oklch(63.1% 0.042 208.5)
-
Step 600
600 (this color)
#51797F
oklch(54.9% 0.046 207.7)
-
Step 700
700
#43686D
oklch(49.1% 0.043 206.6)
-
Step 800
800
#385559
oklch(42.8% 0.035 206.8)
-
Step 900
900
#304649
oklch(37.7% 0.028 206.6)
-
Step 950
950
#1D292B
oklch(27.1% 0.017 208.8)
#51797F 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) | #73767F | 0.045 |
| Deuteranopia (no green cones) | #6B707F | 0.041 |
| Tritanopia (no blue cones) | #407C7B | 0.021 |
| Achromatopsia (no color) | #727272 | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51797F
#51797F
oklch(54.9% 0.046 207.7)
- #8A6763
#8A6763
oklch(54.8% 0.046 26.1)
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 #51797F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.034
- Battleship Gray #6C757D ΔE 0.035
- Grey Blue #647D8E ΔE 0.036
- Battleship Grey #6B7C85 ΔE 0.037
- Stormy Blue #507B9C ΔE 0.045
- Cerulean #457B9D ΔE 0.046
- Teal #008080 ΔE 0.050
- Deep Aqua #08787F ΔE 0.050
Use #51797F 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.