#3B57DF
Closest named color: Warm Blue (#4B57DB). oklch(52.2% 0.209 268.9), rgb(59, 87, 223).
Aa
White text reads best on this color (5.80:1).
About this color
#3B57DF is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.209 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.019 away. White text reads best on it, at 5.80:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.209) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.61:1 |
| White text | 5.80:1 |
Values
| HEX | #3B57DF |
| RGB | rgb(59, 87, 223) |
| HSL | hsl(230, 72%, 55%) |
| OKLCH | oklch(52.2% 0.209 268.9) |
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 #3B57DF | 5.80:1 | AA | Lc -83.7 | Fine for body text |
| Black text on #3B57DF | 3.61:1 | AA large text | Lc 25.6 | Dividers and decoration only |
| #3B57DF text on white | 5.80:1 | AA | Lc 78.4 | Fine for body text |
| #3B57DF text on black | 3.61:1 | AA large text | Lc -23.4 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2EAFE
oklch(93.7% 0.028 268.4)
-
Step 200
200
#CAD8FF
oklch(88.4% 0.056 269.7)
-
Step 300
300
#A7BEFF
oklch(80.8% 0.096 269.2)
-
Step 400
400
#7A9AFF
oklch(70.7% 0.152 269)
-
Step 500
500
#5A7CFF
oklch(63% 0.198 269.1)
-
Step 600
600
#415FF4
oklch(55.6% 0.225 268.9)
-
Step 700
700 (this color)
#3B57DF
oklch(52.2% 0.209 268.9)
-
Step 800
800
#2B40AC
oklch(42.7% 0.174 269.1)
-
Step 900
900
#253888
oklch(37.7% 0.135 268.8)
-
Step 950
950
#16224F
oklch(27% 0.084 268.9)
#3B57DF 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) | #006DE3 | 0.054 |
| Deuteranopia (no green cones) | #005EDC | 0.034 |
| Tritanopia (no blue cones) | #007A93 | 0.165 |
| Achromatopsia (no color) | #656565 | 0.209 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B57DF
#3B57DF
oklch(52.2% 0.209 268.9)
- #826500
#826500
oklch(52.1% 0.106 88.9)
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 #3B57DF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.019
- Azul #1D5DEC ΔE 0.030
- Neon Blue #4361EE ΔE 0.035
- Royal Blue #4169E1 ΔE 0.044
- Bright Blue #0165FC ΔE 0.057
- Cerulean Blue #056EEE ΔE 0.058
- Electric Blue #0652FF ΔE 0.059
- Dark Periwinkle #665FD1 ΔE 0.065
Use #3B57DF 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.