#3B4FB8
Closest named color: Blue Blue (#2242C7). oklch(47.4% 0.167 270.6), rgb(59, 79, 184).
Aa
White text reads best on this color (7.00:1).
About this color
#3B4FB8 is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.167 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.049 away. White text reads best on it, at 7.00:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.167) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.99:1 |
| White text | 7.00:1 |
Values
| HEX | #3B4FB8 |
| RGB | rgb(59, 79, 184) |
| HSL | hsl(230, 51%, 48%) |
| OKLCH | oklch(47.4% 0.167 270.6) |
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 #3B4FB8 | 7.00:1 | AAA | Lc -88.8 | Fine for body text |
| Black text on #3B4FB8 | 2.99:1 | Fails | Lc 20.2 | Dividers and decoration only |
| #3B4FB8 text on white | 7.00:1 | AAA | Lc 83.8 | Fine for body text |
| #3B4FB8 text on black | 2.99:1 | Fails | Lc -18.1 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
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
#ADBFF6
oklch(81% 0.081 270.5)
-
Step 400
400
#829BF1
oklch(70.6% 0.129 270.5)
-
Step 500
500
#6580EC
oklch(63.2% 0.164 270.5)
-
Step 600
600
#4E66DA
oklch(55.5% 0.179 270.7)
-
Step 700
700 (this color)
#3B4FB8
oklch(47.4% 0.167 270.6)
-
Step 800
800
#344599
oklch(42.6% 0.138 270.8)
-
Step 900
900
#2D3B7A
oklch(37.6% 0.108 271)
-
Step 950
950
#1A2347
oklch(26.9% 0.068 270.7)
#3B4FB8 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) | #005FBC | 0.048 |
| Deuteranopia (no green cones) | #0053B6 | 0.039 |
| Tritanopia (no blue cones) | #00697C | 0.137 |
| Achromatopsia (no color) | #595959 | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B4FB8
#3B4FB8
oklch(47.4% 0.167 270.6)
- #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 #3B4FB8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.049
- Blue With A Hint Of Purple #533CC6 ΔE 0.054
- Majorelle Blue #3F37C9 ΔE 0.056
- Warm Blue #4B57DB ΔE 0.062
- Blurple #5539CC ΔE 0.062
- Blueberry #464196 ΔE 0.063
- Iris #6258C4 ΔE 0.065
- Bluey Purple #6241C7 ΔE 0.066
Use #3B4FB8 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.