#4E57AB
Closest named color: Dusky Blue (#475F94). oklch(49.3% 0.133 275.8), rgb(78, 87, 171).
Aa
White text reads best on this color (6.41:1).
About this color
#4E57AB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.133 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.047 away. White text reads best on it, at 6.41:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.27:1 |
| White text | 6.41:1 |
Values
| HEX | #4E57AB |
| RGB | rgb(78, 87, 171) |
| HSL | hsl(234, 37%, 49%) |
| OKLCH | oklch(49.3% 0.133 275.8) |
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 #4E57AB | 6.41:1 | AA | Lc -86.8 | Fine for body text |
| Black text on #4E57AB | 3.27:1 | AA large text | Lc 22.4 | Dividers and decoration only |
| #4E57AB text on white | 6.41:1 | AA | Lc 81.6 | Fine for body text |
| #4E57AB text on black | 3.27:1 | AA large text | Lc -20.2 | 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 700.
-
Step 50
50
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F7
oklch(93.6% 0.019 276.3)
-
Step 200
200
#D2D8F1
oklch(88.5% 0.035 274.9)
-
Step 300
300
#B5BEEB
oklch(81% 0.064 276)
-
Step 400
400
#8F9BE1
oklch(70.7% 0.103 276)
-
Step 500
500
#7481D8
oklch(63.1% 0.131 275.6)
-
Step 600
600
#5E68C5
oklch(55.5% 0.143 276.1)
-
Step 700
700 (this color)
#4E57AB
oklch(49.3% 0.133 275.8)
-
Step 800
800
#3F478A
oklch(42.6% 0.11 275.6)
-
Step 900
900
#363C6E
oklch(37.7% 0.085 276.3)
-
Step 950
950
#1F2441
oklch(27.1% 0.054 274.8)
#4E57AB 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) | #2F63AE | 0.043 |
| Deuteranopia (no green cones) | #235BA9 | 0.046 |
| Tritanopia (no blue cones) | #216A79 | 0.117 |
| Achromatopsia (no color) | #5F5F5F | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4E57AB
#4E57AB
oklch(49.3% 0.133 275.8)
- #736000
#736000
oklch(49.3% 0.101 95.5)
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 #4E57AB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.047
- Iris #6258C4 ΔE 0.050
- Denim Blue #3B5B92 ΔE 0.050
- Twilight #4E518B ΔE 0.052
- French Blue #436BAD ΔE 0.054
- Mid Blue #276AB3 ΔE 0.058
- Blueberry #464196 ΔE 0.066
- Dusk #4E5481 ΔE 0.067
Use #4E57AB 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.