#4272C8
Closest named color: Windows Blue (#3778BF). oklch(56.2% 0.143 261.1), rgb(66, 114, 200).
Aa
White text reads best on this color (4.69:1).
About this color
#4272C8 is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.143 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.025 away. White text reads best on it, at 4.69:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.143) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.47:1 |
| White text | 4.69:1 |
Values
| HEX | #4272C8 |
| RGB | rgb(66, 114, 200) |
| HSL | hsl(219, 55%, 52%) |
| OKLCH | oklch(56.2% 0.143 261.1) |
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 #4272C8 | 4.69:1 | AA | Lc -77.8 | Fine for body text |
| Black text on #4272C8 | 4.47:1 | AA large text | Lc 31.8 | Non-text elements, placeholder text |
| #4272C8 text on white | 4.69:1 | AA | Lc 72.3 | Content text, not long reading |
| #4272C8 text on black | 4.47:1 | AA large text | Lc -29.4 | Dividers and decoration only |
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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CCDAF2
oklch(88.5% 0.036 261.3)
-
Step 300
300
#A9C2EB
oklch(80.9% 0.064 260.3)
-
Step 400
400
#7CA1E1
oklch(70.7% 0.103 261)
-
Step 500
500
#5B88D9
oklch(63.1% 0.132 261.4)
-
Step 600
600 (this color)
#4272C8
oklch(56.2% 0.143 261.1)
-
Step 700
700
#325EAB
oklch(49.2% 0.133 260.7)
-
Step 800
800
#2A4D8B
oklch(42.8% 0.111 260.9)
-
Step 900
900
#26406F
oklch(37.6% 0.087 261.3)
-
Step 950
950
#172641
oklch(27% 0.055 261.4)
#4272C8 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) | #497ACB | 0.024 |
| Deuteranopia (no green cones) | #336EC6 | 0.019 |
| Tritanopia (no blue cones) | #008693 | 0.117 |
| Achromatopsia (no color) | #747474 | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4272C8
#4272C8
oklch(56.2% 0.143 261.1)
- #976C00
#976C00
oklch(56.1% 0.116 81)
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 #4272C8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.025
- French Blue #436BAD ΔE 0.043
- Mid Blue #276AB3 ΔE 0.047
- Royal Blue #4169E1 ΔE 0.047
- Flat Blue #3C73A8 ΔE 0.052
- Nice Blue #107AB0 ΔE 0.056
- Water Blue #0E87CC ΔE 0.058
- Steel Blue #4682B4 ΔE 0.060
Use #4272C8 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.