#4276BC
Closest named color: Windows Blue (#3778BF). oklch(56.3% 0.123 256.4), rgb(66, 118, 188).
Aa
White text reads best on this color (4.61:1).
About this color
#4276BC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.123 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.010 away. White text reads best on it, at 4.61:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.54:1 |
| White text | 4.61:1 |
Values
| HEX | #4276BC |
| RGB | rgb(66, 118, 188) |
| HSL | hsl(214, 48%, 50%) |
| OKLCH | oklch(56.3% 0.123 256.4) |
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 #4276BC | 4.61:1 | AA | Lc -77.3 | Fine for body text |
| Black text on #4276BC | 4.54:1 | AA | Lc 32.3 | Non-text elements, placeholder text |
| #4276BC text on white | 4.61:1 | AA | Lc 71.8 | Content text, not long reading |
| #4276BC text on black | 4.54:1 | AA | Lc -29.8 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF5
oklch(93.7% 0.016 253.9)
-
Step 200
200
#CCDAEE
oklch(88.4% 0.031 257.2)
-
Step 300
300
#AAC3E5
oklch(81% 0.055 256.1)
-
Step 400
400
#7CA3D7
oklch(70.7% 0.088 255.8)
-
Step 500
500
#5B8BCD
oklch(63.1% 0.113 256.6)
-
Step 600
600 (this color)
#4276BC
oklch(56.3% 0.123 256.4)
-
Step 700
700
#3261A0
oklch(49.1% 0.114 256.4)
-
Step 800
800
#2A4F82
oklch(42.6% 0.095 256.9)
-
Step 900
900
#264268
oklch(37.6% 0.074 256.4)
-
Step 950
950
#17273D
oklch(27% 0.047 256.6)
#4276BC 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) | #577BBF | 0.028 |
| Deuteranopia (no green cones) | #4670BB | 0.016 |
| Tritanopia (no blue cones) | #008690 | 0.100 |
| Achromatopsia (no color) | #757575 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4276BC
#4276BC
oklch(56.3% 0.123 256.4)
- #9C6A00
#9C6A00
oklch(56.3% 0.118 76.3)
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 #4276BC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.010
- Flat Blue #3C73A8 ΔE 0.032
- French Blue #436BAD ΔE 0.035
- Nice Blue #107AB0 ΔE 0.038
- Steel Blue #4682B4 ΔE 0.040
- Cool Blue #4984B8 ΔE 0.043
- Mid Blue #276AB3 ΔE 0.045
- Muted Blue #3B719F ΔE 0.047
Use #4276BC 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.