#288C98
Closest named color: Teal Blue (#01889F). oklch(59% 0.09 206.8), rgb(40, 140, 152).
Aa
Black text reads best on this color (5.29:1).
About this color
#288C98 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 59%, its chroma 0.090 and its hue 207°. Its hue sits on the cool side of the wheel. The nearest named color is Teal Blue (#01889F), ΔE 0.022 away. Black text reads best on it, at 5.29:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Teal Blue (#01889F) |
| Black text | 5.29:1 |
| White text | 3.96:1 |
Values
| HEX | #288C98 |
| RGB | rgb(40, 140, 152) |
| HSL | hsl(186, 58%, 38%) |
| OKLCH | oklch(59% 0.09 206.8) |
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 #288C98 | 3.96:1 | AA large text | Lc -72.2 | Content text, not long reading |
| Black text on #288C98 | 5.29:1 | AA | Lc 37.4 | Non-text elements, placeholder text |
| #288C98 text on white | 3.96:1 | AA large text | Lc 66.7 | Content text, not long reading |
| #288C98 text on black | 5.29:1 | AA | Lc -35.0 | 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
#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
#A3C9CE
oklch(81% 0.041 206.2)
-
Step 400
400
#6FACB5
oklch(70.6% 0.064 207.6)
-
Step 500
500
#4398A3
oklch(63.2% 0.083 206.8)
-
Step 600
600 (this color)
#288C98
oklch(59% 0.09 206.8)
-
Step 700
700
#036E79
oklch(49.2% 0.084 207)
-
Step 800
800
#0D5962
oklch(42.6% 0.069 207.4)
-
Step 900
900
#174A50
oklch(37.8% 0.054 206.1)
-
Step 950
950
#0F2B2F
oklch(26.9% 0.034 207.9)
#288C98 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) | #808699 | 0.088 |
| Deuteranopia (no green cones) | #707B98 | 0.080 |
| Tritanopia (no blue cones) | #009290 | 0.027 |
| Achromatopsia (no color) | #808080 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #288C98
#288C98
oklch(59% 0.09 206.8)
- #AC6860
#AC6860
oklch(59% 0.089 27.3)
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 #288C98, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal Blue #01889F ΔE 0.022
- Teal Green #0A9396 ΔE 0.023
- Dark Cyan #008B8B ΔE 0.025
- Dusty Teal #4C9085 ΔE 0.042
- Blue NCS #118AB2 ΔE 0.043
- Sea #3C9992 ΔE 0.046
- Teal #008080 ΔE 0.050
- Blue Green #0F9B8E ΔE 0.052
Use #288C98 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.