#3B4FB9
Closest named color: Blue Blue (#2242C7). oklch(47.5% 0.168 270.6), rgb(59, 79, 185).
Aa
White text reads best on this color (6.98:1).
About this color
#3B4FB9 is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.168 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.048 away. White text reads best on it, at 6.98:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.168) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.00:1 |
| White text | 6.98:1 |
Values
| HEX | #3B4FB9 |
| RGB | rgb(59, 79, 185) |
| HSL | hsl(230, 52%, 48%) |
| OKLCH | oklch(47.5% 0.168 270.6) |
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 #3B4FB9 | 6.98:1 | AA | Lc -88.7 | Fine for body text |
| Black text on #3B4FB9 | 3.00:1 | AA large text | Lc 20.3 | Dividers and decoration only |
| #3B4FB9 text on white | 6.98:1 | AA | Lc 83.8 | Fine for body text |
| #3B4FB9 text on black | 3.00:1 | AA large text | Lc -18.2 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E4E9FA
oklch(93.5% 0.024 272.8)
-
Step 200
200
#CED8F8
oklch(88.5% 0.045 271.7)
-
Step 300
300
#ACBFF6
oklch(81% 0.081 269.7)
-
Step 400
400
#829BF2
oklch(70.7% 0.131 270.6)
-
Step 500
500
#6480ED
oklch(63.2% 0.166 270.2)
-
Step 600
600
#4D66DB
oklch(55.6% 0.18 270.4)
-
Step 700
700 (this color)
#3B4FB9
oklch(47.5% 0.168 270.6)
-
Step 800
800
#34459A
oklch(42.7% 0.14 270.8)
-
Step 900
900
#2D3B7A
oklch(37.6% 0.108 271)
-
Step 950
950
#1A2348
oklch(27% 0.07 270.8)
#3B4FB9 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) | #005FBD | 0.048 |
| Deuteranopia (no green cones) | #0054B7 | 0.039 |
| Tritanopia (no blue cones) | #00697C | 0.138 |
| Achromatopsia (no color) | #595959 | 0.168 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B4FB9
#3B4FB9
oklch(47.5% 0.168 270.6)
- #715900
#715900
oklch(47.5% 0.097 90.5)
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 #3B4FB9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.048
- Blue With A Hint Of Purple #533CC6 ΔE 0.053
- Majorelle Blue #3F37C9 ΔE 0.056
- Warm Blue #4B57DB ΔE 0.061
- Blurple #5539CC ΔE 0.062
- Iris #6258C4 ΔE 0.064
- Blueberry #464196 ΔE 0.064
- Bluey Purple #6241C7 ΔE 0.065
Use #3B4FB9 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.