#3957DE
Closest named color: Warm Blue (#4B57DB). oklch(52% 0.208 268.4), rgb(57, 87, 222).
Aa
White text reads best on this color (5.84:1).
About this color
#3957DE is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.208 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.021 away. White text reads best on it, at 5.84:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.208) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.59:1 |
| White text | 5.84:1 |
Values
| HEX | #3957DE |
| RGB | rgb(57, 87, 222) |
| HSL | hsl(229, 71%, 55%) |
| OKLCH | oklch(52% 0.208 268.4) |
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 #3957DE | 5.84:1 | AA | Lc -83.9 | Fine for body text |
| Black text on #3957DE | 3.59:1 | AA large text | Lc 25.5 | Dividers and decoration only |
| #3957DE text on white | 5.84:1 | AA | Lc 78.6 | Fine for body text |
| #3957DE text on black | 3.59:1 | AA large text | Lc -23.2 | 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
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFE
oklch(93.6% 0.029 266.4)
-
Step 200
200
#C9D9FF
oklch(88.6% 0.055 267.2)
-
Step 300
300
#A7BFFF
oklch(81% 0.095 268.4)
-
Step 400
400
#799AFF
oklch(70.6% 0.153 268.6)
-
Step 500
500
#587DFF
oklch(63.1% 0.197 268.3)
-
Step 600
600
#3F60F3
oklch(55.6% 0.223 268.3)
-
Step 700
700 (this color)
#3957DE
oklch(52% 0.208 268.4)
-
Step 800
800
#2941AB
oklch(42.7% 0.172 268.2)
-
Step 900
900
#243988
oklch(37.8% 0.134 268)
-
Step 950
950
#15224F
oklch(27% 0.084 268.2)
#3957DE 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) | #006DE2 | 0.054 |
| Deuteranopia (no green cones) | #005DDB | 0.032 |
| Tritanopia (no blue cones) | #007A92 | 0.165 |
| Achromatopsia (no color) | #656565 | 0.208 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3957DE
#3957DE
oklch(52% 0.208 268.4)
- #826400
#826400
oklch(51.9% 0.106 88)
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 #3957DE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.021
- Azul #1D5DEC ΔE 0.030
- Neon Blue #4361EE ΔE 0.037
- Royal Blue #4169E1 ΔE 0.045
- Bright Blue #0165FC ΔE 0.058
- Cerulean Blue #056EEE ΔE 0.059
- Electric Blue #0652FF ΔE 0.059
- Iris #6258C4 ΔE 0.067
Use #3957DE 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.