#3B4CBB
Closest named color: Blue Blue (#2242C7). oklch(47.1% 0.175 271.4), rgb(59, 76, 187).
Aa
White text reads best on this color (7.14:1).
About this color
#3B4CBB is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.175 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.042 away. White text reads best on it, at 7.14:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.175) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.93:1 |
| White text | 7.14:1 |
Values
| HEX | #3B4CBB |
| RGB | rgb(59, 76, 187) |
| HSL | hsl(232, 52%, 48%) |
| OKLCH | oklch(47.1% 0.175 271.4) |
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 #3B4CBB | 7.14:1 | AAA | Lc -89.3 | Fine for body text |
| Black text on #3B4CBB | 2.93:1 | Fails | Lc 19.7 | Dividers and decoration only |
| #3B4CBB text on white | 7.14:1 | AAA | Lc 84.3 | Fine for body text |
| #3B4CBB text on black | 2.93:1 | Fails | Lc -17.7 | 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
#E4E9FB
oklch(93.6% 0.025 273.5)
-
Step 200
200
#CED8F9
oklch(88.5% 0.047 272.1)
-
Step 300
300
#ADBEF8
oklch(80.9% 0.084 271.8)
-
Step 400
400
#829AF5
oklch(70.7% 0.136 271.4)
-
Step 500
500
#657EF0
oklch(63% 0.172 271.4)
-
Step 600
600
#4E64DF
oklch(55.5% 0.188 271.3)
-
Step 700
700 (this color)
#3B4CBB
oklch(47.1% 0.175 271.4)
-
Step 800
800
#34449D
oklch(42.7% 0.145 271.2)
-
Step 900
900
#2D3A7C
oklch(37.6% 0.113 271.6)
-
Step 950
950
#1A2349
oklch(27.1% 0.071 270.9)
#3B4CBB 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) | #005EBF | 0.051 |
| Deuteranopia (no green cones) | #0052B9 | 0.040 |
| Tritanopia (no blue cones) | #00687C | 0.143 |
| Achromatopsia (no color) | #585858 | 0.175 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B4CBB
#3B4CBB
oklch(47.1% 0.175 271.4)
- #6F5800
#6F5800
oklch(47% 0.096 91.1)
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 #3B4CBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.042
- Blue With A Hint Of Purple #533CC6 ΔE 0.047
- Majorelle Blue #3F37C9 ΔE 0.048
- Blurple #5539CC ΔE 0.056
- Warm Blue #4B57DB ΔE 0.061
- Bluey Purple #6241C7 ΔE 0.062
- Blueberry #464196 ΔE 0.064
- Sapphire #2138AB ΔE 0.066
Use #3B4CBB 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.