#278688
Closest named color: Dark Cyan (#008B8B). oklch(56.8% 0.085 197.1), rgb(39, 134, 136).
Aa
Black text reads best on this color (4.85:1).
About this color
#278688 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 57%, its chroma 0.085 and its hue 197°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Cyan (#008B8B), ΔE 0.016 away. Black text reads best on it, at 4.85:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Dark Cyan (#008B8B) |
| Black text | 4.85:1 |
| White text | 4.32:1 |
Values
| HEX | #278688 |
| RGB | rgb(39, 134, 136) |
| HSL | hsl(181, 55%, 34%) |
| OKLCH | oklch(56.8% 0.085 197.1) |
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 #278688 | 4.32:1 | AA large text | Lc -75.1 | Fine for body text |
| Black text on #278688 | 4.85:1 | AA | Lc 34.4 | Non-text elements, placeholder text |
| #278688 text on white | 4.32:1 | AA large text | Lc 69.6 | Content text, not long reading |
| #278688 text on black | 4.85:1 | AA | Lc -32.0 | 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
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E2ECEC
oklch(93.6% 0.011 197)
-
Step 200
200
#CADEDE
oklch(88.6% 0.021 196.8)
-
Step 300
300
#A5C9C9
oklch(81% 0.038 196.4)
-
Step 400
400
#72ADAE
oklch(70.8% 0.061 197.2)
-
Step 500
500
#48989A
oklch(63.1% 0.078 197.6)
-
Step 600
600 (this color)
#278688
oklch(56.8% 0.085 197.1)
-
Step 700
700
#116E70
oklch(49% 0.079 197.2)
-
Step 800
800
#145A5B
oklch(42.7% 0.066 196.4)
-
Step 900
900
#1A4A4B
oklch(37.7% 0.051 197.1)
-
Step 950
950
#112B2C
oklch(26.9% 0.032 198.8)
#278688 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) | #7D8088 | 0.088 |
| Deuteranopia (no green cones) | #6E7589 | 0.082 |
| Tritanopia (no blue cones) | #008B86 | 0.019 |
| Achromatopsia (no color) | #797979 | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #278688
#278688
oklch(56.8% 0.085 197.1)
- #A36164
#A36164
oklch(56.7% 0.086 17.2)
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 #278688, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Cyan #008B8B ΔE 0.016
- Teal #008080 ΔE 0.026
- Teal Blue #01889F ΔE 0.035
- Teal Green #0A9396 ΔE 0.038
- Bluegreen #017A79 ΔE 0.044
- Ocean #017B92 ΔE 0.045
- Dusty Teal #4C9085 ΔE 0.045
- Deep Aqua #08787F ΔE 0.046
Use #278688 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.