#4E57A8
Closest named color: Dusky Blue (#475F94). oklch(49.1% 0.128 275.8), rgb(78, 87, 168).
Aa
White text reads best on this color (6.45:1).
About this color
#4E57A8 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.128 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.043 away. White text reads best on it, at 6.45:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.25:1 |
| White text | 6.45:1 |
Values
| HEX | #4E57A8 |
| RGB | rgb(78, 87, 168) |
| HSL | hsl(234, 37%, 48%) |
| OKLCH | oklch(49.1% 0.128 275.8) |
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 #4E57A8 | 6.45:1 | AA | Lc -86.9 | Fine for body text |
| Black text on #4E57A8 | 3.25:1 | AA large text | Lc 22.2 | Dividers and decoration only |
| #4E57A8 text on white | 6.45:1 | AA | Lc 81.9 | Fine for body text |
| #4E57A8 text on black | 3.25:1 | AA large text | Lc -20.0 | 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
#E6E9F6
oklch(93.6% 0.018 275.6)
-
Step 200
200
#D2D8F1
oklch(88.5% 0.035 274.9)
-
Step 300
300
#B5BEE9
oklch(80.9% 0.062 275.7)
-
Step 400
400
#8F9BDF
oklch(70.6% 0.101 275.8)
-
Step 500
500
#7581D5
oklch(63% 0.127 276)
-
Step 600
600
#5E69C3
oklch(55.6% 0.139 275.7)
-
Step 700
700 (this color)
#4E57A8
oklch(49.1% 0.128 275.8)
-
Step 800
800
#404888
oklch(42.8% 0.105 275.6)
-
Step 900
900
#363D6D
oklch(37.8% 0.082 275.5)
-
Step 950
950
#1F2440
oklch(27% 0.052 274.7)
#4E57A8 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) | #3262AB | 0.040 |
| Deuteranopia (no green cones) | #275BA6 | 0.043 |
| Tritanopia (no blue cones) | #256977 | 0.114 |
| Achromatopsia (no color) | #5E5E5E | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4E57A8
#4E57A8
oklch(49.1% 0.128 275.8)
- #725F00
#725F00
oklch(49% 0.101 95.4)
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 #4E57A8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.043
- Denim Blue #3B5B92 ΔE 0.046
- Twilight #4E518B ΔE 0.047
- Iris #6258C4 ΔE 0.054
- French Blue #436BAD ΔE 0.054
- Mid Blue #276AB3 ΔE 0.059
- Dusk #4E5481 ΔE 0.063
- Blueberry #464196 ΔE 0.064
Use #4E57A8 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.