#3E51CF
Closest named color: Warm Blue (#4B57DB). oklch(49.9% 0.194 270.9), rgb(62, 81, 207).
Aa
White text reads best on this color (6.39:1).
About this color
#3E51CF is a medium-dark, vivid blue. In OKLCH its lightness is 50%, its chroma 0.194 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.030 away. White text reads best on it, at 6.39:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.194) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.28:1 |
| White text | 6.39:1 |
Values
| HEX | #3E51CF |
| RGB | rgb(62, 81, 207) |
| HSL | hsl(232, 60%, 53%) |
| OKLCH | oklch(49.9% 0.194 270.9) |
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 #3E51CF | 6.39:1 | AA | Lc -86.4 | Fine for body text |
| Black text on #3E51CF | 3.28:1 | AA large text | Lc 22.8 | Dividers and decoration only |
| #3E51CF text on white | 6.39:1 | AA | Lc 81.2 | Fine for body text |
| #3E51CF text on black | 3.28:1 | AA large text | Lc -20.6 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3E9FD
oklch(93.5% 0.028 272.5)
-
Step 200
200
#CCD8FD
oklch(88.5% 0.053 271.1)
-
Step 300
300
#AABEFE
oklch(81% 0.094 270.8)
-
Step 400
400
#7E99FE
oklch(70.7% 0.151 270.8)
-
Step 500
500
#617CFC
oklch(63.2% 0.192 271)
-
Step 600
600
#4A60EB
oklch(55.5% 0.21 271)
-
Step 700
700 (this color)
#3E51CF
oklch(49.9% 0.194 270.9)
-
Step 800
800
#3141A5
oklch(42.6% 0.161 270.9)
-
Step 900
900
#2A3983
oklch(37.7% 0.125 270.6)
-
Step 950
950
#19224D
oklch(27.1% 0.08 271.2)
#3E51CF 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) | #0066D3 | 0.055 |
| Deuteranopia (no green cones) | #0058CD | 0.039 |
| Tritanopia (no blue cones) | #007188 | 0.157 |
| Achromatopsia (no color) | #5F5F5F | 0.195 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3E51CF
#3E51CF
oklch(49.9% 0.194 270.9)
- #796000
#796000
oklch(50% 0.102 90.9)
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 #3E51CF, closest first.
No curated palette has a color within ΔE 0.04 of #3E51CF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.030
- Blue With A Hint Of Purple #533CC6 ΔE 0.051
- Blue Blue #2242C7 ΔE 0.051
- Blurple #5539CC ΔE 0.054
- Majorelle Blue #3F37C9 ΔE 0.054
- Azul #1D5DEC ΔE 0.055
- Iris #6258C4 ΔE 0.058
- Bluey Purple #6241C7 ΔE 0.059
Use #3E51CF 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.