#228BDA
Closest named color: Water Blue (#0E87CC). oklch(61.9% 0.15 247.1), rgb(34, 139, 218).
Aa
Black text reads best on this color (5.77:1).
About this color
#228BDA is a medium-dark, vivid blue. In OKLCH its lightness is 62%, its chroma 0.150 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.025 away. Black text reads best on it, at 5.77:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | vivid (0.150) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.77:1 |
| White text | 3.63:1 |
Values
| HEX | #228BDA |
| RGB | rgb(34, 139, 218) |
| HSL | hsl(206, 73%, 49%) |
| OKLCH | oklch(61.9% 0.15 247.1) |
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 #228BDA | 3.63:1 | AA large text | Lc -69.0 | Content text, not long reading |
| Black text on #228BDA | 5.77:1 | AA | Lc 40.6 | Non-text elements, placeholder text |
| #228BDA text on white | 3.63:1 | AA large text | Lc 63.5 | Content text, not long reading |
| #228BDA text on black | 5.77:1 | AA | Lc -38.2 | 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
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DFECF8
oklch(93.7% 0.021 245.9)
-
Step 200
200
#C4DCF3
oklch(88.4% 0.041 247.1)
-
Step 300
300
#9BC6EE
oklch(81% 0.073 246.9)
-
Step 400
400
#60A7E6
oklch(70.8% 0.117 247.1)
-
Step 500
500 (this color)
#228BDA
oklch(61.9% 0.15 247.1)
-
Step 600
600
#0078C3
oklch(55.7% 0.146 246.8)
-
Step 700
700
#0064A5
oklch(49% 0.13 247.2)
-
Step 800
800
#005288
oklch(42.7% 0.112 246.9)
-
Step 900
900
#024472
oklch(37.6% 0.098 247.2)
-
Step 950
950
#072843
oklch(26.9% 0.063 247.7)
#228BDA 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) | #658FDD | 0.055 |
| Deuteranopia (no green cones) | #4A7FD8 | 0.037 |
| Tritanopia (no blue cones) | #009EA8 | 0.106 |
| Achromatopsia (no color) | #868686 | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #228BDA
#228BDA
oklch(61.9% 0.15 247.1)
- #BB7300
#BB7300
oklch(61.9% 0.136 67.4)
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 #228BDA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.025
- Dark Sky Blue #448EE4 ΔE 0.028
- Chefchaouen Blue #4895EF ΔE 0.049
- Cool Blue #4984B8 ΔE 0.054
- Dodger Blue #1E90FF ΔE 0.055
- Soft Blue #6488EA ΔE 0.059
- Steel Blue #4682B4 ΔE 0.059
- Windows Blue #3778BF ΔE 0.059
Use #228BDA 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.