#378B93
Closest named color: Dark Cyan (#008B8B). oklch(58.9% 0.081 203.9), rgb(55, 139, 147).
Aa
Black text reads best on this color (5.27:1).
About this color
#378B93 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 59%, its chroma 0.081 and its hue 204°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Cyan (#008B8B), ΔE 0.026 away. Black text reads best on it, at 5.27:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Dark Cyan (#008B8B) |
| Black text | 5.27:1 |
| White text | 3.97:1 |
Values
| HEX | #378B93 |
| RGB | rgb(55, 139, 147) |
| HSL | hsl(185, 46%, 40%) |
| OKLCH | oklch(58.9% 0.081 203.9) |
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 #378B93 | 3.97:1 | AA large text | Lc -72.4 | Content text, not long reading |
| Black text on #378B93 | 5.27:1 | AA | Lc 37.2 | Non-text elements, placeholder text |
| #378B93 text on white | 3.97:1 | AA large text | Lc 66.9 | Content text, not long reading |
| #378B93 text on black | 5.27:1 | AA | Lc -34.8 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECED
oklch(93.6% 0.011 204.1)
-
Step 200
200
#CBDDDF
oklch(88.5% 0.019 204.8)
-
Step 300
300
#A6C8CB
oklch(80.9% 0.037 203)
-
Step 400
400
#75ACB1
oklch(70.8% 0.058 203.1)
-
Step 500
500
#4D979E
oklch(63.2% 0.074 203.6)
-
Step 600
600 (this color)
#378B93
oklch(58.9% 0.081 203.9)
-
Step 700
700
#1C6D74
oklch(49.1% 0.075 203.6)
-
Step 800
800
#1B595F
oklch(42.8% 0.062 204.3)
-
Step 900
900
#1D494D
oklch(37.6% 0.049 203.4)
-
Step 950
950
#122B2D
oklch(27% 0.031 202.3)
#378B93 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) | #818594 | 0.081 |
| Deuteranopia (no green cones) | #727B93 | 0.073 |
| Tritanopia (no blue cones) | #00908D | 0.028 |
| Achromatopsia (no color) | #7F7F7F | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #378B93
#378B93
oklch(58.9% 0.081 203.9)
- #A86A66
#A86A66
oklch(59% 0.08 23.8)
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 #378B93, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Cyan #008B8B ΔE 0.026
- Teal Green #0A9396 ΔE 0.026
- Teal Blue #01889F ΔE 0.030
- Dusty Teal #4C9085 ΔE 0.034
- Sea #3C9992 ΔE 0.044
- Teal #008080 ΔE 0.050
- Blue NCS #118AB2 ΔE 0.051
- Blue Green #0F9B8E ΔE 0.052
Use #378B93 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.