#3943A4
Closest named color: Blueberry (#464196). oklch(43.4% 0.155 273.6), rgb(57, 67, 164).
Aa
White text reads best on this color (8.35:1).
About this color
#3943A4 is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.155 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.029 away. White text reads best on it, at 8.35:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.155) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.51:1 |
| White text | 8.35:1 |
Values
| HEX | #3943A4 |
| RGB | rgb(57, 67, 164) |
| HSL | hsl(234, 48%, 43%) |
| OKLCH | oklch(43.4% 0.155 273.6) |
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 #3943A4 | 8.35:1 | AAA | Lc -93.0 | Preferred for body text |
| Black text on #3943A4 | 2.51:1 | Fails | Lc 15.6 | Dividers and decoration only |
| #3943A4 text on white | 8.35:1 | AAA | Lc 88.4 | Fine for body text |
| #3943A4 text on black | 2.51:1 | Fails | Lc -13.8 | Not readable |
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 800.
-
Step 50
50
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E4E9FC
oklch(93.6% 0.026 274.1)
-
Step 200
200
#CED8FB
oklch(88.6% 0.049 272.8)
-
Step 300
300
#AEBDFC
oklch(81% 0.091 273.9)
-
Step 400
400
#8498FA
oklch(70.7% 0.145 273.4)
-
Step 500
500
#687BF7
oklch(63.1% 0.185 273.4)
-
Step 600
600
#5360E6
oklch(55.6% 0.201 273.7)
-
Step 700
700
#444EC8
oklch(49.1% 0.187 273.7)
-
Step 800
800 (this color)
#3943A4
oklch(43.4% 0.155 273.6)
-
Step 900
900
#2F3880
oklch(37.6% 0.121 273.7)
-
Step 950
950
#1B224B
oklch(27% 0.076 273)
#3943A4 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) | #0053A7 | 0.051 |
| Deuteranopia (no green cones) | #0049A2 | 0.043 |
| Tritanopia (no blue cones) | #005B6D | 0.129 |
| Achromatopsia (no color) | #4E4E4E | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3943A4
#3943A4
oklch(43.4% 0.155 273.6)
- #614F00
#614F00
oklch(43.3% 0.089 93.7)
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 #3943A4, closest first.
No curated palette has a color within ΔE 0.04 of #3943A4.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.029
- Sapphire #2138AB ΔE 0.043
- Dark Slate Blue #483D8B ΔE 0.047
- Cobalt #1E488F ΔE 0.047
- Blue Blue #2242C7 ΔE 0.061
- Dusk Blue #26538D ΔE 0.062
- Majorelle Blue #3F37C9 ΔE 0.063
- Blue With A Hint Of Purple #533CC6 ΔE 0.067
Use #3943A4 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.