#4E73A6
Closest named color: Flat Blue (#3C73A8). oklch(55% 0.091 256.6), rgb(78, 115, 166).
Aa
White text reads best on this color (4.85:1).
About this color
#4E73A6 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.091 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Flat Blue (#3C73A8), ΔE 0.018 away. White text reads best on it, at 4.85:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Flat Blue (#3C73A8) |
| Black text | 4.32:1 |
| White text | 4.85:1 |
Values
| HEX | #4E73A6 |
| RGB | rgb(78, 115, 166) |
| HSL | hsl(215, 36%, 48%) |
| OKLCH | oklch(55% 0.091 256.6) |
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 #4E73A6 | 4.85:1 | AA | Lc -79.0 | Fine for body text |
| Black text on #4E73A6 | 4.32:1 | AA large text | Lc 30.5 | Non-text elements, placeholder text |
| #4E73A6 text on white | 4.85:1 | AA | Lc 73.5 | Content text, not long reading |
| #4E73A6 text on black | 4.32:1 | AA large text | Lc -28.2 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#D0DAE8
oklch(88.5% 0.022 256.7)
-
Step 300
300
#B0C2DB
oklch(80.8% 0.041 256.6)
-
Step 400
400
#87A3C9
oklch(70.8% 0.064 256.1)
-
Step 500
500
#688BBC
oklch(63% 0.084 256.9)
-
Step 600
600 (this color)
#4E73A6
oklch(55% 0.091 256.6)
-
Step 700
700
#406290
oklch(49.1% 0.084 256.3)
-
Step 800
800
#355075
oklch(42.7% 0.07 256.5)
-
Step 900
900
#2E425E
oklch(37.5% 0.055 256.9)
-
Step 950
950
#1B2737
oklch(26.9% 0.034 255.8)
#4E73A6 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) | #5F76A8 | 0.024 |
| Deuteranopia (no green cones) | #546EA5 | 0.015 |
| Tritanopia (no blue cones) | #207E85 | 0.080 |
| Achromatopsia (no color) | #717171 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4E73A6
#4E73A6
oklch(55% 0.091 256.6)
- #8F6A2E
#8F6A2E
oklch(55% 0.09 76.9)
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 #4E73A6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Blue #3C73A8 ΔE 0.018
- Dull Blue #49759C ΔE 0.019
- Muted Blue #3B719F ΔE 0.024
- French Blue #436BAD ΔE 0.031
- Cerulean #457B9D ΔE 0.031
- Stormy Blue #507B9C ΔE 0.032
- Metallic Blue #4F738E ΔE 0.038
- Windows Blue #3778BF ΔE 0.042
Use #4E73A6 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.