#3B4BC5
Closest named color: Blue Blue (#2242C7). oklch(47.8% 0.189 271.4), rgb(59, 75, 197).
Aa
White text reads best on this color (7.00:1).
About this color
#3B4BC5 is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.189 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.036 away. White text reads best on it, at 7.00:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.189) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.99:1 |
| White text | 7.00:1 |
Values
| HEX | #3B4BC5 |
| RGB | rgb(59, 75, 197) |
| HSL | hsl(233, 54%, 50%) |
| OKLCH | oklch(47.8% 0.189 271.4) |
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 #3B4BC5 | 7.00:1 | AAA | Lc -88.7 | Fine for body text |
| Black text on #3B4BC5 | 2.99:1 | Fails | Lc 20.3 | Dividers and decoration only |
| #3B4BC5 text on white | 7.00:1 | AAA | Lc 83.7 | Fine for body text |
| #3B4BC5 text on black | 2.99:1 | Fails | Lc -18.3 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3E9FC
oklch(93.5% 0.027 271.9)
-
Step 200
200
#CDD8FC
oklch(88.5% 0.051 271.9)
-
Step 300
300
#ABBEFC
oklch(80.9% 0.09 271.1)
-
Step 400
400
#8099FB
oklch(70.6% 0.146 271.4)
-
Step 500
500
#637CF9
oklch(63.1% 0.187 271.5)
-
Step 600
600
#4C61E8
oklch(55.6% 0.204 271.4)
-
Step 700
700 (this color)
#3B4BC5
oklch(47.8% 0.189 271.4)
-
Step 800
800
#3342A3
oklch(42.7% 0.157 271.4)
-
Step 900
900
#2C3981
oklch(37.7% 0.122 271.6)
-
Step 950
950
#19224C
oklch(27% 0.078 271.2)
#3B4BC5 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) | #0060C9 | 0.055 |
| Deuteranopia (no green cones) | #0053C3 | 0.039 |
| Tritanopia (no blue cones) | #006A81 | 0.151 |
| Achromatopsia (no color) | #595959 | 0.190 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B4BC5
#3B4BC5
oklch(47.8% 0.189 271.4)
- #715A00
#715A00
oklch(47.7% 0.098 91.4)
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 #3B4BC5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.036
- Majorelle Blue #3F37C9 ΔE 0.040
- Blue With A Hint Of Purple #533CC6 ΔE 0.042
- Blurple #5539CC ΔE 0.048
- Warm Blue #4B57DB ΔE 0.051
- Bluey Purple #6241C7 ΔE 0.059
- Iris #6258C4 ΔE 0.067
- Sapphire #2138AB ΔE 0.072
Use #3B4BC5 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.