#378F8B
Closest named color: Dusty Teal (#4C9085). oklch(59.7% 0.083 191), rgb(55, 143, 139).
Aa
Black text reads best on this color (5.46:1).
About this color
#378F8B is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 60%, its chroma 0.083 and its hue 191°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Teal (#4C9085), ΔE 0.019 away. Black text reads best on it, at 5.46:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Dusty Teal (#4C9085) |
| Black text | 5.46:1 |
| White text | 3.84:1 |
Values
| HEX | #378F8B |
| RGB | rgb(55, 143, 139) |
| HSL | hsl(177, 44%, 39%) |
| OKLCH | oklch(59.7% 0.083 191) |
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 #378F8B | 3.84:1 | AA large text | Lc -71.2 | Content text, not long reading |
| Black text on #378F8B | 5.46:1 | AA | Lc 38.4 | Non-text elements, placeholder text |
| #378F8B text on white | 3.84:1 | AA large text | Lc 65.7 | Content text, not long reading |
| #378F8B text on black | 5.46:1 | AA | Lc -36.0 | 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 500.
-
Step 50
50
#F2F7F6
oklch(97.2% 0.005 183)
-
Step 100
100
#E1ECEC
oklch(93.5% 0.012 197)
-
Step 200
200
#C9DEDD
oklch(88.5% 0.022 193.3)
-
Step 300
300
#A3C9C7
oklch(80.8% 0.04 192.4)
-
Step 400
400
#6FAEAA
oklch(70.7% 0.065 190.7)
-
Step 500
500 (this color)
#378F8B
oklch(59.7% 0.083 191)
-
Step 600
600
#188480
oklch(55.6% 0.09 191)
-
Step 700
700
#02706C
oklch(49.2% 0.084 190.4)
-
Step 800
800
#0C5B58
oklch(42.7% 0.07 190.8)
-
Step 900
900
#174B48
oklch(37.8% 0.054 189.7)
-
Step 950
950
#0F2C2A
oklch(27% 0.035 189.2)
#378F8B 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) | #87888B | 0.088 |
| Deuteranopia (no green cones) | #797E8C | 0.082 |
| Tritanopia (no blue cones) | #00938E | 0.020 |
| Achromatopsia (no color) | #828282 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #378F8B
#378F8B
oklch(59.7% 0.083 191)
- #AB6A73
#AB6A73
oklch(59.7% 0.084 10.9)
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 #378F8B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Teal #4C9085 ΔE 0.019
- Teal Green #0A9396 ΔE 0.021
- Dark Cyan #008B8B ΔE 0.026
- Sea #3C9992 ΔE 0.030
- Blue Green #0F9B8E ΔE 0.036
- Persian Green #2A9D8F ΔE 0.040
- Teal Blue #01889F ΔE 0.047
- Grey Teal #5E9B8A ΔE 0.053
Use #378F8B 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.