#3959DF
Closest named color: Warm Blue (#4B57DB). oklch(52.4% 0.207 268), rgb(57, 89, 223).
Aa
White text reads best on this color (5.72:1).
About this color
#3959DF is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.207 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 5.72:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.207) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.66:1 |
| White text | 5.72:1 |
Values
| HEX | #3959DF |
| RGB | rgb(57, 89, 223) |
| HSL | hsl(228, 72%, 55%) |
| OKLCH | oklch(52.4% 0.207 268) |
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 #3959DF | 5.72:1 | AA | Lc -83.3 | Fine for body text |
| Black text on #3959DF | 3.66:1 | AA large text | Lc 26.0 | Dividers and decoration only |
| #3959DF text on white | 5.72:1 | AA | Lc 78.0 | Fine for body text |
| #3959DF text on black | 3.66:1 | AA large text | Lc -23.8 | 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 600.
-
Step 50
50
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFD
oklch(93.7% 0.027 267.5)
-
Step 200
200
#CAD9FC
oklch(88.5% 0.051 267)
-
Step 300
300
#A7BFFE
oklch(81% 0.093 268.2)
-
Step 400
400
#799BFD
oklch(70.7% 0.149 268)
-
Step 500
500
#597EFB
oklch(63.1% 0.19 268.1)
-
Step 600
600 (this color)
#3959DF
oklch(52.4% 0.207 268)
-
Step 700
700
#3451CC
oklch(49.1% 0.193 268.1)
-
Step 800
800
#2B43A5
oklch(42.7% 0.16 268.2)
-
Step 900
900
#263A82
oklch(37.6% 0.124 268.2)
-
Step 950
950
#16234C
oklch(27% 0.078 267.7)
#3959DF 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) | #006EE3 | 0.052 |
| Deuteranopia (no green cones) | #005FDC | 0.031 |
| Tritanopia (no blue cones) | #007B93 | 0.164 |
| Achromatopsia (no color) | #666666 | 0.207 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3959DF
#3959DF
oklch(52.4% 0.207 268)
- #846500
#846500
oklch(52.3% 0.107 87.5)
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 #3959DF, 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 0.028
- Neon Blue #4361EE ΔE 0.033
- Royal Blue #4169E1 ΔE 0.041
- Cerulean Blue #056EEE ΔE 0.054
- Bright Blue #0165FC ΔE 0.055
- Electric Blue #0652FF ΔE 0.059
- Dark Periwinkle #665FD1 ΔE 0.065
Use #3959DF 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.