#288BA6
Closest named color: Teal Blue (#01889F). oklch(59.3% 0.096 220.4), rgb(40, 139, 166).
Aa
Black text reads best on this color (5.33:1).
About this color
#288BA6 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 59%, its chroma 0.096 and its hue 220°. Its hue sits on the cool side of the wheel. The nearest named color is Teal Blue (#01889F), ΔE 0.019 away. Black text reads best on it, at 5.33:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Teal Blue (#01889F) |
| Black text | 5.33:1 |
| White text | 3.93:1 |
Values
| HEX | #288BA6 |
| RGB | rgb(40, 139, 166) |
| HSL | hsl(193, 61%, 40%) |
| OKLCH | oklch(59.3% 0.096 220.4) |
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 #288BA6 | 3.93:1 | AA large text | Lc -71.9 | Content text, not long reading |
| Black text on #288BA6 | 5.33:1 | AA | Lc 37.7 | Non-text elements, placeholder text |
| #288BA6 text on white | 3.93:1 | AA large text | Lc 66.4 | Content text, not long reading |
| #288BA6 text on black | 5.33:1 | AA | Lc -35.3 | 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
#F1F6F8
oklch(97% 0.006 223.5)
-
Step 100
100
#E1ECF0
oklch(93.6% 0.013 221.4)
-
Step 200
200
#C9DDE4
oklch(88.5% 0.023 220.8)
-
Step 300
300
#A3C8D4
oklch(81% 0.043 219.5)
-
Step 400
400
#6EABBF
oklch(70.7% 0.069 220.7)
-
Step 500
500
#4296AF
oklch(63.2% 0.089 220.4)
-
Step 600
600 (this color)
#288BA6
oklch(59.3% 0.096 220.4)
-
Step 700
700
#006C84
oklch(49.2% 0.09 220.2)
-
Step 800
800
#0B586B
oklch(42.7% 0.074 220.1)
-
Step 900
900
#164957
oklch(37.8% 0.058 219.7)
-
Step 950
950
#0F2B33
oklch(27.1% 0.037 219.3)
#288BA6 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) | #7B87A7 | 0.080 |
| Deuteranopia (no green cones) | #6A7BA6 | 0.071 |
| Tritanopia (no blue cones) | #009494 | 0.046 |
| Achromatopsia (no color) | #808080 | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #288BA6
#288BA6
oklch(59.3% 0.096 220.4)
- #AF6A51
#AF6A51
oklch(59.4% 0.096 40.6)
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 #288BA6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal Blue #01889F ΔE 0.019
- Blue NCS #118AB2 ΔE 0.021
- Teal Green #0A9396 ΔE 0.041
- Steel Blue #4682B4 ΔE 0.043
- Off Blue #5684AE ΔE 0.044
- Dusty Blue #5A86AD ΔE 0.044
- Cool Blue #4984B8 ΔE 0.046
- Cerulean #457B9D ΔE 0.046
Use #288BA6 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.