#278D79
Closest named color: Dark Cyan (#008B8B). oklch(58.1% 0.096 176.6), rgb(39, 141, 121).
Aa
Black text reads best on this color (5.17:1).
About this color
#278D79 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 58%, its chroma 0.096 and its hue 177°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Cyan (#008B8B), ΔE 0.031 away. Black text reads best on it, at 5.17:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Dark Cyan (#008B8B) |
| Black text | 5.17:1 |
| White text | 4.06:1 |
Values
| HEX | #278D79 |
| RGB | rgb(39, 141, 121) |
| HSL | hsl(168, 57%, 35%) |
| OKLCH | oklch(58.1% 0.096 176.6) |
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 #278D79 | 4.06:1 | AA large text | Lc -73.0 | Content text, not long reading |
| Black text on #278D79 | 5.17:1 | AA | Lc 36.6 | Non-text elements, placeholder text |
| #278D79 text on white | 4.06:1 | AA large text | Lc 67.5 | Content text, not long reading |
| #278D79 text on black | 5.17:1 | AA | Lc -34.2 | 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
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E2EDE9
oklch(93.7% 0.013 172.4)
-
Step 200
200
#C9DFD9
oklch(88.6% 0.025 177.6)
-
Step 300
300
#A4CAC0
oklch(80.9% 0.043 177.4)
-
Step 400
400
#70AF9F
oklch(70.7% 0.069 176.4)
-
Step 500
500
#459B88
oklch(63.1% 0.088 176.6)
-
Step 600
600 (this color)
#278D79
oklch(58.1% 0.096 176.6)
-
Step 700
700
#07715F
oklch(49.1% 0.09 176.3)
-
Step 800
800
#0F5C4E
oklch(42.7% 0.074 176.8)
-
Step 900
900
#184C41
oklch(37.9% 0.058 176.4)
-
Step 950
950
#102C26
oklch(26.9% 0.036 177.5)
#278D79 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) | #888478 | 0.102 |
| Deuteranopia (no green cones) | #7A7A7B | 0.097 |
| Tritanopia (no blue cones) | #008F87 | 0.021 |
| Achromatopsia (no color) | #7E7E7E | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #278D79
#278D79
oklch(58.1% 0.096 176.6)
- #A8617C
#A8617C
oklch(58.1% 0.097 356.3)
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 #278D79, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Cyan #008B8B ΔE 0.031
- Viridian #1E9167 ΔE 0.034
- Dusty Teal #4C9085 ΔE 0.036
- Teal Green #0A9396 ΔE 0.042
- Blue Green #0F9B8E ΔE 0.044
- Ocean Green #3D9973 ΔE 0.044
- Sea Green #2E8B57 ΔE 0.048
- Teal #008080 ΔE 0.048
Use #278D79 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.