#4873CE
Closest named color: Windows Blue (#3778BF). oklch(57% 0.148 263.4), rgb(72, 115, 206).
Aa
Black text reads best on this color (4.61:1).
About this color
#4873CE is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.148 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.033 away. Black text reads best on it, at 4.61:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.148) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.61:1 |
| White text | 4.54:1 |
Values
| HEX | #4873CE |
| RGB | rgb(72, 115, 206) |
| HSL | hsl(221, 58%, 55%) |
| OKLCH | oklch(57% 0.148 263.4) |
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 #4873CE | 4.54:1 | AA | Lc -76.8 | Fine for body text |
| Black text on #4873CE | 4.61:1 | AA | Lc 32.8 | Non-text elements, placeholder text |
| #4873CE text on white | 4.54:1 | AA | Lc 71.3 | Content text, not long reading |
| #4873CE text on black | 4.61:1 | AA | Lc -30.4 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CDDAF2
oklch(88.6% 0.036 262.8)
-
Step 300
300
#AAC1ED
oklch(80.9% 0.067 263.3)
-
Step 400
400
#7EA0E4
oklch(70.8% 0.107 263.5)
-
Step 500
500
#5D87DC
oklch(63.2% 0.137 263.2)
-
Step 600
600 (this color)
#4873CE
oklch(57% 0.148 263.4)
-
Step 700
700
#365CAE
oklch(49.1% 0.138 263.5)
-
Step 800
800
#2D4C8D
oklch(42.8% 0.114 263.2)
-
Step 900
900
#284070
oklch(37.8% 0.088 262.8)
-
Step 950
950
#182642
oklch(27.2% 0.056 263.1)
#4873CE 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) | #477DD1 | 0.026 |
| Deuteranopia (no green cones) | #3170CC | 0.024 |
| Tritanopia (no blue cones) | #008896 | 0.124 |
| Achromatopsia (no color) | #767676 | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4873CE
#4873CE
oklch(57% 0.148 263.4)
- #987000
#987000
oklch(57% 0.117 83.7)
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 #4873CE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.033
- Royal Blue #4169E1 ΔE 0.042
- French Blue #436BAD ΔE 0.054
- Mid Blue #276AB3 ΔE 0.058
- Dark Periwinkle #665FD1 ΔE 0.059
- Water Blue #0E87CC ΔE 0.059
- Flat Blue #3C73A8 ΔE 0.062
- Cerulean Blue #056EEE ΔE 0.064
Use #4873CE 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.