#227AC4
Closest named color: Windows Blue (#3778BF). oklch(56.6% 0.14 249), rgb(34, 122, 196).
Aa
Black text reads best on this color (4.64:1).
About this color
#227AC4 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.140 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.014 away. Black text reads best on it, at 4.64:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.140) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.64:1 |
| White text | 4.51:1 |
Values
| HEX | #227AC4 |
| RGB | rgb(34, 122, 196) |
| HSL | hsl(207, 70%, 45%) |
| OKLCH | oklch(56.6% 0.14 249) |
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 #227AC4 | 4.51:1 | AA | Lc -76.4 | Fine for body text |
| Black text on #227AC4 | 4.64:1 | AA | Lc 33.2 | Non-text elements, placeholder text |
| #227AC4 text on white | 4.51:1 | AA | Lc 70.9 | Content text, not long reading |
| #227AC4 text on black | 4.64:1 | AA | Lc -30.8 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C8DCF0
oklch(88.6% 0.035 248.2)
-
Step 300
300
#A2C5E8
oklch(81% 0.062 248.6)
-
Step 400
400
#6DA6DD
oklch(70.8% 0.101 248.6)
-
Step 500
500
#438ED3
oklch(63.1% 0.128 248.9)
-
Step 600
600 (this color)
#227AC4
oklch(56.6% 0.14 249)
-
Step 700
700
#0D64A6
oklch(49.2% 0.129 248.7)
-
Step 800
800
#115187
oklch(42.6% 0.108 249.5)
-
Step 900
900
#17446C
oklch(37.7% 0.084 248.9)
-
Step 950
950
#0F283F
oklch(27% 0.053 248.7)
#227AC4 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) | #577EC7 | 0.047 |
| Deuteranopia (no green cones) | #3E70C3 | 0.030 |
| Tritanopia (no blue cones) | #008C95 | 0.102 |
| Achromatopsia (no color) | #767676 | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #227AC4
#227AC4
oklch(56.6% 0.14 249)
- #A46700
#A46700
oklch(56.7% 0.123 69.5)
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 #227AC4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.014
- Nice Blue #107AB0 ΔE 0.033
- Water Blue #0E87CC ΔE 0.036
- Flat Blue #3C73A8 ΔE 0.045
- Steel Blue #4682B4 ΔE 0.046
- Mid Blue #276AB3 ΔE 0.048
- Cool Blue #4984B8 ΔE 0.049
- French Blue #436BAD ΔE 0.051
Use #227AC4 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.