#288AA9
Closest named color: Blue NCS (#118AB2). oklch(59.2% 0.099 223.8), rgb(40, 138, 169).
Aa
Black text reads best on this color (5.29:1).
About this color
#288AA9 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 59%, its chroma 0.099 and its hue 224°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.015 away. Black text reads best on it, at 5.29:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 5.29:1 |
| White text | 3.96:1 |
Values
| HEX | #288AA9 |
| RGB | rgb(40, 138, 169) |
| HSL | hsl(194, 62%, 41%) |
| OKLCH | oklch(59.2% 0.099 223.8) |
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 #288AA9 | 3.96:1 | AA large text | Lc -72.1 | Content text, not long reading |
| Black text on #288AA9 | 5.29:1 | AA | Lc 37.4 | Non-text elements, placeholder text |
| #288AA9 text on white | 3.96:1 | AA large text | Lc 66.6 | Content text, not long reading |
| #288AA9 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
#F1F6F8
oklch(97% 0.006 223.5)
-
Step 100
100
#E1ECF0
oklch(93.6% 0.013 221.4)
-
Step 200
200
#C9DDE5
oklch(88.5% 0.024 223.7)
-
Step 300
300
#A3C7D6
oklch(80.8% 0.044 225.1)
-
Step 400
400
#6EABC1
oklch(70.8% 0.071 222.8)
-
Step 500
500
#4295B2
oklch(63.1% 0.091 224.1)
-
Step 600
600 (this color)
#288AA9
oklch(59.2% 0.099 223.8)
-
Step 700
700
#026B87
oklch(49.1% 0.092 224.1)
-
Step 800
800
#0C576E
oklch(42.6% 0.076 224.9)
-
Step 900
900
#164859
oklch(37.7% 0.059 224.5)
-
Step 950
950
#0F2A34
oklch(26.9% 0.038 225.1)
#288AA9 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) | #7887AB | 0.076 |
| Deuteranopia (no green cones) | #677AA9 | 0.068 |
| Tritanopia (no blue cones) | #009394 | 0.050 |
| Achromatopsia (no color) | #808080 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #288AA9
#288AA9
oklch(59.2% 0.099 223.8)
- #AE6A4C
#AE6A4C
oklch(59.2% 0.098 44.3)
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 #288AA9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.015
- Teal Blue #01889F ΔE 0.021
- Steel Blue #4682B4 ΔE 0.038
- Off Blue #5684AE ΔE 0.040
- Cool Blue #4984B8 ΔE 0.040
- Dusty Blue #5A86AD ΔE 0.042
- Cerulean #457B9D ΔE 0.044
- Teal Green #0A9396 ΔE 0.047
Use #288AA9 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.