#4C75BB
Closest named color: Windows Blue (#3778BF). oklch(56.5% 0.118 260.5), rgb(76, 117, 187).
Aa
White text reads best on this color (4.59:1).
About this color
#4C75BB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.118 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.020 away. White text reads best on it, at 4.59:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.56:1 |
| White text | 4.59:1 |
Values
| HEX | #4C75BB |
| RGB | rgb(76, 117, 187) |
| HSL | hsl(218, 45%, 52%) |
| OKLCH | oklch(56.5% 0.118 260.5) |
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 #4C75BB | 4.59:1 | AA | Lc -77.2 | Fine for body text |
| Black text on #4C75BB | 4.56:1 | AA | Lc 32.3 | Non-text elements, placeholder text |
| #4C75BB text on white | 4.59:1 | AA | Lc 71.7 | Content text, not long reading |
| #4C75BB text on black | 4.56:1 | AA | Lc -29.9 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CEDAED
oklch(88.5% 0.029 259.6)
-
Step 300
300
#ADC2E4
oklch(81% 0.053 260)
-
Step 400
400
#82A1D6
oklch(70.6% 0.085 260.9)
-
Step 500
500
#6389CB
oklch(63% 0.109 261)
-
Step 600
600 (this color)
#4C75BB
oklch(56.5% 0.118 260.5)
-
Step 700
700
#3B5F9F
oklch(49% 0.111 261.1)
-
Step 800
800
#314E80
oklch(42.6% 0.091 260.7)
-
Step 900
900
#2B4167
oklch(37.6% 0.071 260.8)
-
Step 950
950
#19263C
oklch(26.8% 0.045 260.5)
#4C75BB 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) | #577BBE | 0.022 |
| Deuteranopia (no green cones) | #4970BA | 0.015 |
| Tritanopia (no blue cones) | #00858F | 0.103 |
| Achromatopsia (no color) | #757575 | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4C75BB
#4C75BB
oklch(56.5% 0.118 260.5)
- #996D00
#996D00
oklch(56.5% 0.117 80.6)
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 #4C75BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.020
- Flat Blue #3C73A8 ΔE 0.035
- French Blue #436BAD ΔE 0.035
- Steel Blue #4682B4 ΔE 0.041
- Cool Blue #4984B8 ΔE 0.044
- Nice Blue #107AB0 ΔE 0.046
- Muted Blue #3B719F ΔE 0.049
- Dull Blue #49759C ΔE 0.050
Use #4C75BB 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.