#288E79
Closest named color: Viridian (#1E9167). oklch(58.4% 0.097 175.8), rgb(40, 142, 121).
Aa
Black text reads best on this color (5.23:1).
About this color
#288E79 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 58%, its chroma 0.097 and its hue 176°. Its hue sits on the cool side of the wheel. The nearest named color is Viridian (#1E9167), ΔE 0.032 away. Black text reads best on it, at 5.23:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Viridian (#1E9167) |
| Black text | 5.23:1 |
| White text | 4.01:1 |
Values
| HEX | #288E79 |
| RGB | rgb(40, 142, 121) |
| HSL | hsl(168, 56%, 36%) |
| OKLCH | oklch(58.4% 0.097 175.8) |
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 #288E79 | 4.01:1 | AA large text | Lc -72.6 | Content text, not long reading |
| Black text on #288E79 | 5.23:1 | AA | Lc 37.0 | Non-text elements, placeholder text |
| #288E79 text on white | 4.01:1 | AA large text | Lc 67.1 | Content text, not long reading |
| #288E79 text on black | 5.23:1 | AA | Lc -34.6 | 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
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E2EDE9
oklch(93.7% 0.013 172.4)
-
Step 200
200
#C9DFD8
oklch(88.5% 0.025 174.7)
-
Step 300
300
#A4CABF
oklch(80.8% 0.043 175.7)
-
Step 400
400
#70AF9F
oklch(70.7% 0.069 176.4)
-
Step 500
500
#459B87
oklch(63.1% 0.089 175.7)
-
Step 600
600 (this color)
#288E79
oklch(58.4% 0.097 175.8)
-
Step 700
700
#07715F
oklch(49.1% 0.09 176.3)
-
Step 800
800
#0F5C4D
oklch(42.7% 0.075 175.7)
-
Step 900
900
#184C40
oklch(37.8% 0.059 174.9)
-
Step 950
950
#102C26
oklch(26.9% 0.036 177.5)
#288E79 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) | #898578 | 0.102 |
| Deuteranopia (no green cones) | #7B7B7B | 0.097 |
| Tritanopia (no blue cones) | #009088 | 0.022 |
| Achromatopsia (no color) | #7F7F7F | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #288E79
#288E79
oklch(58.4% 0.097 175.8)
- #A9627D
#A9627D
oklch(58.4% 0.097 356.3)
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 #288E79, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Viridian #1E9167 ΔE 0.032
- Dark Cyan #008B8B ΔE 0.033
- Dusty Teal #4C9085 ΔE 0.034
- Ocean Green #3D9973 ΔE 0.041
- Blue Green #0F9B8E ΔE 0.041
- Teal Green #0A9396 ΔE 0.042
- Sea Green #2E8B57 ΔE 0.047
- Sea #3C9992 ΔE 0.048
Use #288E79 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.