#3957C4
Closest named color: Warm Blue (#4B57DB). oklch(49.8% 0.174 267.9), rgb(57, 87, 196).
Aa
White text reads best on this color (6.29:1).
About this color
#3957C4 is a medium-dark, vivid blue. In OKLCH its lightness is 50%, its chroma 0.174 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.042 away. White text reads best on it, at 6.29:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.174) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.33:1 |
| White text | 6.29:1 |
Values
| HEX | #3957C4 |
| RGB | rgb(57, 87, 196) |
| HSL | hsl(227, 55%, 50%) |
| OKLCH | oklch(49.8% 0.174 267.9) |
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 #3957C4 | 6.29:1 | AA | Lc -86.1 | Fine for body text |
| Black text on #3957C4 | 3.33:1 | AA large text | Lc 23.1 | Dividers and decoration only |
| #3957C4 text on white | 6.29:1 | AA | Lc 80.9 | Fine for body text |
| #3957C4 text on black | 3.33:1 | AA large text | Lc -21.0 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFB
oklch(93.7% 0.024 267.9)
-
Step 200
200
#CCD9F9
oklch(88.6% 0.046 267.9)
-
Step 300
300
#A9BFF8
oklch(80.8% 0.085 268.1)
-
Step 400
400
#7C9CF4
oklch(70.6% 0.134 267.8)
-
Step 500
500
#5D81F0
oklch(63.2% 0.171 267.8)
-
Step 600
600
#4567DF
oklch(55.6% 0.187 267.9)
-
Step 700
700 (this color)
#3957C4
oklch(49.8% 0.174 267.9)
-
Step 800
800
#2E469C
oklch(42.7% 0.143 268)
-
Step 900
900
#283C7C
oklch(37.7% 0.111 267.7)
-
Step 950
950
#172449
oklch(27.1% 0.071 267.1)
#3957C4 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) | #0067C8 | 0.045 |
| Deuteranopia (no green cones) | #005AC2 | 0.033 |
| Tritanopia (no blue cones) | #007285 | 0.140 |
| Achromatopsia (no color) | #606060 | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3957C4
#3957C4
oklch(49.8% 0.174 267.9)
- #7B5E00
#7B5E00
oklch(49.8% 0.102 87.6)
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 #3957C4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.042
- Iris #6258C4 ΔE 0.055
- Blue Blue #2242C7 ΔE 0.058
- Mid Blue #276AB3 ΔE 0.060
- Royal Blue #4169E1 ΔE 0.063
- Blue With A Hint Of Purple #533CC6 ΔE 0.063
- Azul #1D5DEC ΔE 0.064
- Majorelle Blue #3F37C9 ΔE 0.068
Use #3957C4 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.