#378D99
Closest named color: Teal Green (#0A9396). oklch(59.7% 0.083 207.9), rgb(55, 141, 153).
Aa
Black text reads best on this color (5.43:1).
About this color
#378D99 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 60%, its chroma 0.083 and its hue 208°. Its hue sits on the cool side of the wheel. The nearest named color is Teal Green (#0A9396), ΔE 0.025 away. Black text reads best on it, at 5.43:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Teal Green (#0A9396) |
| Black text | 5.43:1 |
| White text | 3.86:1 |
Values
| HEX | #378D99 |
| RGB | rgb(55, 141, 153) |
| HSL | hsl(187, 47%, 41%) |
| OKLCH | oklch(59.7% 0.083 207.9) |
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 #378D99 | 3.86:1 | AA large text | Lc -71.4 | Content text, not long reading |
| Black text on #378D99 | 5.43:1 | AA | Lc 38.2 | Non-text elements, placeholder text |
| #378D99 text on white | 3.86:1 | AA large text | Lc 65.9 | Content text, not long reading |
| #378D99 text on black | 5.43:1 | AA | Lc -35.8 | 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 500.
-
Step 50
50
#F1F6F7
oklch(97% 0.005 211)
-
Step 100
100
#E1ECEE
oklch(93.5% 0.012 209.8)
-
Step 200
200
#C9DEE1
oklch(88.6% 0.023 207.1)
-
Step 300
300
#A3C8CE
oklch(80.8% 0.04 208.4)
-
Step 400
400
#6FACB6
oklch(70.7% 0.065 208.9)
-
Step 500
500 (this color)
#378D99
oklch(59.7% 0.083 207.9)
-
Step 600
600
#18828F
oklch(55.7% 0.09 207.8)
-
Step 700
700
#026E79
oklch(49.2% 0.084 206.9)
-
Step 800
800
#0D5963
oklch(42.6% 0.069 208.8)
-
Step 900
900
#174A51
oklch(37.9% 0.054 207.9)
-
Step 950
950
#0F2B2F
oklch(26.9% 0.034 207.9)
#378D99 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) | #81889A | 0.079 |
| Deuteranopia (no green cones) | #737D99 | 0.073 |
| Tritanopia (no blue cones) | #009391 | 0.031 |
| Achromatopsia (no color) | #828282 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #378D99
#378D99
oklch(59.7% 0.083 207.9)
- #AB6C63
#AB6C63
oklch(59.7% 0.082 28.6)
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 #378D99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal Green #0A9396 ΔE 0.025
- Teal Blue #01889F ΔE 0.030
- Dark Cyan #008B8B ΔE 0.033
- Dusty Teal #4C9085 ΔE 0.037
- Sea #3C9992 ΔE 0.042
- Blue NCS #118AB2 ΔE 0.045
- Blue Green #0F9B8E ΔE 0.052
- Dusty Blue #5A86AD ΔE 0.053
Use #378D99 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.