#3945B5
Closest named color: Blue Blue (#2242C7). oklch(45.2% 0.176 272.5), rgb(57, 69, 181).
Aa
White text reads best on this color (7.79:1).
About this color
#3945B5 is a medium-dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.176 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.038 away. White text reads best on it, at 7.79:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | vivid (0.176) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.69:1 |
| White text | 7.79:1 |
Values
| HEX | #3945B5 |
| RGB | rgb(57, 69, 181) |
| HSL | hsl(234, 52%, 47%) |
| OKLCH | oklch(45.2% 0.176 272.5) |
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 #3945B5 | 7.79:1 | AAA | Lc -91.3 | Preferred for body text |
| Black text on #3945B5 | 2.69:1 | Fails | Lc 17.5 | Dividers and decoration only |
| #3945B5 text on white | 7.79:1 | AAA | Lc 86.6 | Fine for body text |
| #3945B5 text on black | 2.69:1 | Fails | Lc -15.5 | 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 800.
-
Step 50
50
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E3E9FE
oklch(93.6% 0.029 273.1)
-
Step 200
200
#CCD8FF
oklch(88.6% 0.055 271.8)
-
Step 300
300
#ABBDFF
oklch(80.9% 0.096 272.3)
-
Step 400
400
#8198FF
oklch(70.7% 0.153 272.5)
-
Step 500
500
#6479FF
oklch(63% 0.199 272.7)
-
Step 600
600
#4D5BF5
oklch(55.6% 0.227 272.5)
-
Step 700
700
#3F49D6
oklch(49.2% 0.212 272.5)
-
Step 800
800 (this color)
#3945B5
oklch(45.2% 0.176 272.5)
-
Step 900
900
#2C3689
oklch(37.7% 0.137 272.7)
-
Step 950
950
#192150
oklch(27.1% 0.086 272.1)
#3945B5 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) | #0058B9 | 0.053 |
| Deuteranopia (no green cones) | #004DB3 | 0.041 |
| Tritanopia (no blue cones) | #006176 | 0.142 |
| Achromatopsia (no color) | #525252 | 0.176 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3945B5
#3945B5
oklch(45.2% 0.176 272.5)
- #685400
#685400
oklch(45.3% 0.093 92.9)
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 #3945B5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.038
- Majorelle Blue #3F37C9 ΔE 0.041
- Blue With A Hint Of Purple #533CC6 ΔE 0.048
- Sapphire #2138AB ΔE 0.048
- Blueberry #464196 ΔE 0.053
- Blurple #5539CC ΔE 0.057
- Bluey Purple #6241C7 ΔE 0.068
- Cobalt #1E488F ΔE 0.070
Use #3945B5 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.