#278C68
Closest named color: Viridian (#1E9167). oklch(57.3% 0.107 164.7), rgb(39, 140, 104).
Aa
Black text reads best on this color (5.03:1).
About this color
#278C68 is a medium-dark, moderately saturated green. In OKLCH its lightness is 57%, its chroma 0.107 and its hue 165°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Viridian (#1E9167), ΔE 0.016 away. Black text reads best on it, at 5.03:1.
| Hue family | Greens |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.107) |
| Temperature | in between |
| Nearest name | Viridian (#1E9167) |
| Black text | 5.03:1 |
| White text | 4.16:1 |
Values
| HEX | #278C68 |
| RGB | rgb(39, 140, 104) |
| HSL | hsl(159, 56%, 35%) |
| OKLCH | oklch(57.3% 0.107 164.7) |
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 #278C68 | 4.16:1 | AA large text | Lc -73.9 | Content text, not long reading |
| Black text on #278C68 | 5.03:1 | AA | Lc 35.7 | Non-text elements, placeholder text |
| #278C68 text on white | 4.16:1 | AA large text | Lc 68.4 | Content text, not long reading |
| #278C68 text on black | 5.03:1 | AA | Lc -33.3 | 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
#F2F7F4
oklch(97.2% 0.007 160.1)
-
Step 100
100
#E2EDE7
oklch(93.6% 0.014 162.5)
-
Step 200
200
#CADFD5
oklch(88.5% 0.026 165.6)
-
Step 300
300
#A5CBB9
oklch(80.9% 0.048 164.8)
-
Step 400
400
#71B094
oklch(70.6% 0.077 164.6)
-
Step 500
500
#479C7A
oklch(63% 0.098 164.7)
-
Step 600
600 (this color)
#278C68
oklch(57.3% 0.107 164.7)
-
Step 700
700
#0D7252
oklch(49.1% 0.1 164.8)
-
Step 800
800
#125D43
oklch(42.7% 0.083 164.5)
-
Step 900
900
#194C39
oklch(37.6% 0.064 165.3)
-
Step 950
950
#102D21
oklch(27.1% 0.042 164)
#278C68 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) | #898266 | 0.105 |
| Deuteranopia (no green cones) | #7C786A | 0.102 |
| Tritanopia (no blue cones) | #008C82 | 0.039 |
| Achromatopsia (no color) | #7C7C7C | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #278C68
#278C68
oklch(57.3% 0.107 164.7)
- #A45D87
#A45D87
oklch(57.3% 0.107 344.6)
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 #278C68, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Viridian #1E9167 ΔE 0.016
- Sea Green #2E8B57 ΔE 0.023
- Dark Sage #598556 ΔE 0.042
- Ocean Green #3D9973 ΔE 0.044
- Light Forest Green #4F9153 ΔE 0.045
- Fern Green #548D44 ΔE 0.054
- Dark Cyan #008B8B ΔE 0.054
- Dusty Teal #4C9085 ΔE 0.055
Use #278C68 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.