#378581
Closest named color: Dark Cyan (#008B8B). oklch(56.7% 0.076 190.6), rgb(55, 133, 129).
Aa
Black text reads best on this color (4.83:1).
About this color
#378581 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 57%, its chroma 0.076 and its hue 191°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Cyan (#008B8B), ΔE 0.025 away. Black text reads best on it, at 4.83:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Dark Cyan (#008B8B) |
| Black text | 4.83:1 |
| White text | 4.34:1 |
Values
| HEX | #378581 |
| RGB | rgb(55, 133, 129) |
| HSL | hsl(177, 41%, 37%) |
| OKLCH | oklch(56.7% 0.076 190.6) |
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 #378581 | 4.34:1 | AA large text | Lc -75.4 | Fine for body text |
| Black text on #378581 | 4.83:1 | AA | Lc 34.2 | Non-text elements, placeholder text |
| #378581 text on white | 4.34:1 | AA large text | Lc 69.9 | Content text, not long reading |
| #378581 text on black | 4.83:1 | AA | Lc -31.8 | 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
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E3ECEB
oklch(93.6% 0.01 189.1)
-
Step 200
200
#CCDDDC
oklch(88.4% 0.018 192.6)
-
Step 300
300
#A8C8C6
oklch(80.9% 0.034 191.8)
-
Step 400
400
#78ACA8
oklch(70.7% 0.055 190)
-
Step 500
500
#539793
oklch(63% 0.07 190.6)
-
Step 600
600 (this color)
#378581
oklch(56.7% 0.076 190.6)
-
Step 700
700
#256D6A
oklch(49% 0.07 191.2)
-
Step 800
800
#215956
oklch(42.6% 0.058 190.3)
-
Step 900
900
#214947
oklch(37.6% 0.045 191.1)
-
Step 950
950
#142B2A
oklch(27% 0.029 191.9)
#378581 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) | #7E7F81 | 0.081 |
| Deuteranopia (no green cones) | #717582 | 0.076 |
| Tritanopia (no blue cones) | #008884 | 0.021 |
| Achromatopsia (no color) | #797979 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #378581
#378581
oklch(56.7% 0.076 190.6)
- #9E646C
#9E646C
oklch(56.8% 0.076 10.8)
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 #378581, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Cyan #008B8B ΔE 0.025
- Teal #008080 ΔE 0.030
- Dusty Teal #4C9085 ΔE 0.040
- Teal Green #0A9396 ΔE 0.044
- Bluegreen #017A79 ΔE 0.045
- Teal Blue #01889F ΔE 0.046
- Deep Aqua #08787F ΔE 0.049
- Ocean #017B92 ΔE 0.053
Use #378581 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.