#378779
Closest named color: Dark Cyan (#008B8B). oklch(57% 0.081 179.9), rgb(55, 135, 121).
Aa
Black text reads best on this color (4.90:1).
About this color
#378779 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 57%, its chroma 0.081 and its hue 180°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Cyan (#008B8B), ΔE 0.030 away. Black text reads best on it, at 4.90:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Dark Cyan (#008B8B) |
| Black text | 4.90:1 |
| White text | 4.28:1 |
Values
| HEX | #378779 |
| RGB | rgb(55, 135, 121) |
| HSL | hsl(170, 42%, 37%) |
| OKLCH | oklch(57% 0.081 179.9) |
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 #378779 | 4.28:1 | AA large text | Lc -74.9 | Content text, not long reading |
| Black text on #378779 | 4.90:1 | AA | Lc 34.7 | Non-text elements, placeholder text |
| #378779 text on white | 4.28:1 | AA large text | Lc 69.4 | Content text, not long reading |
| #378779 text on black | 4.90:1 | AA | Lc -32.3 | 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
#F2F6F5
oklch(97% 0.004 179.7)
-
Step 100
100
#E3ECEA
oklch(93.6% 0.01 181.4)
-
Step 200
200
#CCDED9
oklch(88.6% 0.02 177.4)
-
Step 300
300
#A8C9C1
oklch(80.9% 0.037 179)
-
Step 400
400
#78ADA2
oklch(70.7% 0.058 180.2)
-
Step 500
500
#52988B
oklch(63% 0.074 180.3)
-
Step 600
600 (this color)
#378779
oklch(57% 0.081 179.9)
-
Step 700
700
#246F62
oklch(49.2% 0.076 179.3)
-
Step 800
800
#205A50
oklch(42.7% 0.062 179.9)
-
Step 900
900
#214A42
oklch(37.7% 0.048 179.1)
-
Step 950
950
#142B27
oklch(26.9% 0.03 181.4)
#378779 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) | #827F78 | 0.087 |
| Deuteranopia (no green cones) | #75767A | 0.082 |
| Tritanopia (no blue cones) | #008983 | 0.023 |
| Achromatopsia (no color) | #7A7A7A | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #378779
#378779
oklch(57% 0.081 179.9)
- #9F6375
#9F6375
oklch(57.1% 0.081 0.6)
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 #378779, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Cyan #008B8B ΔE 0.030
- Dusty Teal #4C9085 ΔE 0.037
- Teal #008080 ΔE 0.037
- Teal Green #0A9396 ΔE 0.047
- Viridian #1E9167 ΔE 0.049
- Bluegreen #017A79 ΔE 0.051
- Dark Sage #598556 ΔE 0.053
- Slate Green #658D6D ΔE 0.053
Use #378779 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.