#4B71CC
Closest named color: Windows Blue (#3778BF). oklch(56.6% 0.147 265), rgb(75, 113, 204).
Aa
White text reads best on this color (4.63:1).
About this color
#4B71CC is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.147 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.035 away. White text reads best on it, at 4.63:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.147) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.53:1 |
| White text | 4.63:1 |
Values
| HEX | #4B71CC |
| RGB | rgb(75, 113, 204) |
| HSL | hsl(222, 56%, 55%) |
| OKLCH | oklch(56.6% 0.147 265) |
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 #4B71CC | 4.63:1 | AA | Lc -77.4 | Fine for body text |
| Black text on #4B71CC | 4.53:1 | AA | Lc 32.2 | Non-text elements, placeholder text |
| #4B71CC text on white | 4.63:1 | AA | Lc 71.9 | Content text, not long reading |
| #4B71CC text on black | 4.53:1 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CDD9F2
oklch(88.4% 0.037 265.1)
-
Step 300
300
#ACC1EC
oklch(81% 0.065 264.5)
-
Step 400
400
#809FE3
oklch(70.6% 0.106 265)
-
Step 500
500
#6186DB
oklch(63.1% 0.135 265)
-
Step 600
600 (this color)
#4B71CC
oklch(56.6% 0.147 265)
-
Step 700
700
#3A5BAD
oklch(49% 0.136 265.2)
-
Step 800
800
#304B8C
oklch(42.7% 0.113 265)
-
Step 900
900
#2A3F70
oklch(37.6% 0.088 265)
-
Step 950
950
#192542
oklch(27% 0.057 265.8)
#4B71CC 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) | #467BCF | 0.026 |
| Deuteranopia (no green cones) | #316FCA | 0.026 |
| Tritanopia (no blue cones) | #008694 | 0.125 |
| Achromatopsia (no color) | #757575 | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B71CC
#4B71CC
oklch(56.6% 0.147 265)
- #957000
#957000
oklch(56.7% 0.116 85.5)
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 #4B71CC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.035
- Royal Blue #4169E1 ΔE 0.042
- French Blue #436BAD ΔE 0.051
- Dark Periwinkle #665FD1 ΔE 0.054
- Mid Blue #276AB3 ΔE 0.056
- Flat Blue #3C73A8 ΔE 0.061
- Water Blue #0E87CC ΔE 0.064
- Iris #6258C4 ΔE 0.065
Use #4B71CC 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.