#378978
Closest named color: Dark Cyan (#008B8B). oklch(57.5% 0.084 177.2), rgb(55, 137, 120).
Aa
Black text reads best on this color (5.01:1).
About this color
#378978 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 57%, its chroma 0.084 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 5.01:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Dark Cyan (#008B8B) |
| Black text | 5.01:1 |
| White text | 4.19:1 |
Values
| HEX | #378978 |
| RGB | rgb(55, 137, 120) |
| HSL | hsl(168, 43%, 38%) |
| OKLCH | oklch(57.5% 0.084 177.2) |
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 #378978 | 4.19:1 | AA large text | Lc -74.1 | Content text, not long reading |
| Black text on #378978 | 5.01:1 | AA | Lc 35.4 | Non-text elements, placeholder text |
| #378978 text on white | 4.19:1 | AA large text | Lc 68.7 | Content text, not long reading |
| #378978 text on black | 5.01:1 | AA | Lc -33.0 | 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
#E3ECEA
oklch(93.6% 0.01 181.4)
-
Step 200
200
#CBDED9
oklch(88.5% 0.021 178.3)
-
Step 300
300
#A8C9C0
oklch(80.9% 0.038 177)
-
Step 400
400
#77ADA0
oklch(70.6% 0.06 177.8)
-
Step 500
500
#519989
oklch(63.1% 0.077 177.5)
-
Step 600
600 (this color)
#378978
oklch(57.5% 0.084 177.2)
-
Step 700
700
#226F60
oklch(49.1% 0.078 177.3)
-
Step 800
800
#1F5B4E
oklch(42.8% 0.065 176.1)
-
Step 900
900
#204A41
oklch(37.6% 0.05 177.5)
-
Step 950
950
#142C26
oklch(27.1% 0.032 175.7)
#378978 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) | #848177 | 0.088 |
| Deuteranopia (no green cones) | #787879 | 0.085 |
| Tritanopia (no blue cones) | #008B84 | 0.024 |
| Achromatopsia (no color) | #7C7C7C | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #378978
#378978
oklch(57.5% 0.084 177.2)
- #A16379
#A16379
oklch(57.4% 0.085 357.3)
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 #378978, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Cyan #008B8B ΔE 0.031
- Dusty Teal #4C9085 ΔE 0.034
- Teal #008080 ΔE 0.042
- Viridian #1E9167 ΔE 0.043
- Teal Green #0A9396 ΔE 0.046
- Slate Green #658D6D ΔE 0.049
- Dark Sage #598556 ΔE 0.050
- Sea Green #2E8B57 ΔE 0.052
Use #378978 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.