#228FCB
Closest named color: Water Blue (#0E87CC). oklch(62% 0.129 239.3), rgb(34, 143, 203).
Aa
Black text reads best on this color (5.85:1).
About this color
#228FCB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.129 and its hue 239°. 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 5.85:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.85:1 |
| White text | 3.58:1 |
Values
| HEX | #228FCB |
| RGB | rgb(34, 143, 203) |
| HSL | hsl(201, 71%, 46%) |
| OKLCH | oklch(62% 0.129 239.3) |
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 #228FCB | 3.58:1 | AA large text | Lc -68.5 | Content text, not long reading |
| Black text on #228FCB | 5.85:1 | AA | Lc 41.1 | Non-text elements, placeholder text |
| #228FCB text on white | 3.58:1 | AA large text | Lc 63.0 | Content text, not long reading |
| #228FCB text on black | 5.85:1 | AA | Lc -38.7 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#DFECF5
oklch(93.6% 0.018 237.8)
-
Step 200
200
#C5DDEE
oklch(88.5% 0.035 238.7)
-
Step 300
300
#9BC7E6
oklch(80.9% 0.064 239.3)
-
Step 400
400
#61A9D9
oklch(70.7% 0.101 239.5)
-
Step 500
500 (this color)
#228FCB
oklch(62% 0.129 239.3)
-
Step 600
600
#007BB4
oklch(55.5% 0.126 239.3)
-
Step 700
700
#006898
oklch(49.2% 0.11 238.7)
-
Step 800
800
#00557E
oklch(42.8% 0.097 239.2)
-
Step 900
900
#024669
oklch(37.6% 0.084 239.7)
-
Step 950
950
#07293E
oklch(26.9% 0.055 240.7)
#228FCB 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) | #7290CE | 0.068 |
| Deuteranopia (no green cones) | #5C80CA | 0.055 |
| Tritanopia (no blue cones) | #009EA4 | 0.085 |
| Achromatopsia (no color) | #878787 | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #228FCB
#228FCB
oklch(62% 0.129 239.3)
- #BE7027
#BE7027
oklch(61.9% 0.129 59)
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 #228FCB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.025
- Cool Blue #4984B8 ΔE 0.040
- Blue NCS #118AB2 ΔE 0.040
- Steel Blue #4682B4 ΔE 0.045
- Dark Sky Blue #448EE4 ΔE 0.046
- Faded Blue #658CBB ΔE 0.054
- Off Blue #5684AE ΔE 0.054
- Dusty Blue #5A86AD ΔE 0.056
Use #228FCB 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.