#228BC0
Closest named color: Blue NCS (#118AB2). oklch(60.4% 0.121 236.8), rgb(34, 139, 192).
Aa
Black text reads best on this color (5.52:1).
About this color
#228BC0 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.121 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.023 away. Black text reads best on it, at 5.52:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 5.52:1 |
| White text | 3.80:1 |
Values
| HEX | #228BC0 |
| RGB | rgb(34, 139, 192) |
| HSL | hsl(200, 70%, 44%) |
| OKLCH | oklch(60.4% 0.121 236.8) |
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 #228BC0 | 3.80:1 | AA large text | Lc -70.6 | Content text, not long reading |
| Black text on #228BC0 | 5.52:1 | AA | Lc 39.0 | Non-text elements, placeholder text |
| #228BC0 text on white | 3.80:1 | AA large text | Lc 65.1 | Content text, not long reading |
| #228BC0 text on black | 5.52:1 | AA | Lc -36.6 | 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 500.
-
Step 50
50
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E0ECF4
oklch(93.6% 0.017 236.7)
-
Step 200
200
#C6DDEC
oklch(88.5% 0.032 236.4)
-
Step 300
300
#9DC7E2
oklch(80.9% 0.059 236.7)
-
Step 400
400
#63AAD4
oklch(70.8% 0.094 236.2)
-
Step 500
500 (this color)
#228BC0
oklch(60.4% 0.121 236.8)
-
Step 600
600
#007CB1
oklch(55.6% 0.122 237.2)
-
Step 700
700
#006895
oklch(49% 0.107 237)
-
Step 800
800
#00557B
oklch(42.6% 0.093 237.2)
-
Step 900
900
#064766
oklch(37.7% 0.079 236.9)
-
Step 950
950
#092A3C
oklch(27.1% 0.05 237)
#228BC0 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) | #718BC2 | 0.069 |
| Deuteranopia (no green cones) | #5C7CBF | 0.057 |
| Tritanopia (no blue cones) | #00999D | 0.078 |
| Achromatopsia (no color) | #838383 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #228BC0
#228BC0
oklch(60.4% 0.121 236.8)
- #B76C2F
#B76C2F
oklch(60.4% 0.121 56.5)
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 #228BC0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.023
- Water Blue #0E87CC ΔE 0.025
- Cool Blue #4984B8 ΔE 0.029
- Steel Blue #4682B4 ΔE 0.032
- Off Blue #5684AE ΔE 0.043
- Dusty Blue #5A86AD ΔE 0.047
- Nice Blue #107AB0 ΔE 0.053
- Windows Blue #3778BF ΔE 0.053
Use #228BC0 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.