#3E57B1
Closest named color: Mid Blue (#276AB3). oklch(48.7% 0.146 268.8), rgb(62, 87, 177).
Aa
White text reads best on this color (6.55:1).
About this color
#3E57B1 is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.146 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.052 away. White text reads best on it, at 6.55:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.146) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.20:1 |
| White text | 6.55:1 |
Values
| HEX | #3E57B1 |
| RGB | rgb(62, 87, 177) |
| HSL | hsl(227, 48%, 47%) |
| OKLCH | oklch(48.7% 0.146 268.8) |
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 #3E57B1 | 6.55:1 | AA | Lc -87.2 | Fine for body text |
| Black text on #3E57B1 | 3.20:1 | AA large text | Lc 21.9 | Dividers and decoration only |
| #3E57B1 text on white | 6.55:1 | AA | Lc 82.2 | Fine for body text |
| #3E57B1 text on black | 3.20:1 | AA large text | Lc -19.7 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF8
oklch(93.7% 0.02 267.3)
-
Step 200
200
#CED9F4
oklch(88.5% 0.039 267.9)
-
Step 300
300
#AEBFEF
oklch(80.8% 0.071 269.6)
-
Step 400
400
#839DE7
oklch(70.6% 0.113 268.7)
-
Step 500
500
#6683E0
oklch(63.1% 0.144 269)
-
Step 600
600
#4E6BCE
oklch(55.7% 0.156 268.7)
-
Step 700
700 (this color)
#3E57B1
oklch(48.7% 0.146 268.8)
-
Step 800
800
#344990
oklch(42.8% 0.12 268.6)
-
Step 900
900
#2D3D73
oklch(37.6% 0.094 269.1)
-
Step 950
950
#1A2443
oklch(26.9% 0.06 268.7)
#3E57B1 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) | #2463B4 | 0.036 |
| Deuteranopia (no green cones) | #0058AF | 0.041 |
| Tritanopia (no blue cones) | #006C7B | 0.123 |
| Achromatopsia (no color) | #5D5D5D | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3E57B1
#3E57B1
oklch(48.7% 0.146 268.8)
- #765C00
#765C00
oklch(48.7% 0.1 89.5)
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 #3E57B1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.052
- Denim Blue #3B5B92 ΔE 0.053
- Dusky Blue #475F94 ΔE 0.056
- French Blue #436BAD ΔE 0.057
- Iris #6258C4 ΔE 0.059
- Twilight #4E518B ΔE 0.063
- Dusk Blue #26538D ΔE 0.066
- Blueberry #464196 ΔE 0.067
Use #3E57B1 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.