#3B4ABC
Closest named color: Blue Blue (#2242C7). oklch(46.8% 0.178 271.8), rgb(59, 74, 188).
Aa
White text reads best on this color (7.26:1).
About this color
#3B4ABC is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.178 and its hue 272°. 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 7.26:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.178) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.89:1 |
| White text | 7.26:1 |
Values
| HEX | #3B4ABC |
| RGB | rgb(59, 74, 188) |
| HSL | hsl(233, 52%, 48%) |
| OKLCH | oklch(46.8% 0.178 271.8) |
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 #3B4ABC | 7.26:1 | AAA | Lc -89.6 | Fine for body text |
| Black text on #3B4ABC | 2.89:1 | Fails | Lc 19.3 | Dividers and decoration only |
| #3B4ABC text on white | 7.26:1 | AAA | Lc 84.7 | Fine for body text |
| #3B4ABC text on black | 2.89:1 | Fails | Lc -17.3 | 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
#E4E9FB
oklch(93.6% 0.025 273.5)
-
Step 200
200
#CED8FA
oklch(88.5% 0.048 272.4)
-
Step 300
300
#ADBEF9
oklch(81% 0.086 271.9)
-
Step 400
400
#839AF6
oklch(70.8% 0.137 271.9)
-
Step 500
500
#667DF3
oklch(63.1% 0.177 272.1)
-
Step 600
600
#4F63E1
oklch(55.6% 0.192 271.8)
-
Step 700
700 (this color)
#3B4ABC
oklch(46.8% 0.178 271.8)
-
Step 800
800
#35439E
oklch(42.6% 0.148 272)
-
Step 900
900
#2D3A7E
oklch(37.7% 0.116 271.6)
-
Step 950
950
#1A224A
oklch(26.9% 0.075 272)
#3B4ABC 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) | #005DC0 | 0.053 |
| Deuteranopia (no green cones) | #0051BA | 0.040 |
| Tritanopia (no blue cones) | #00677C | 0.145 |
| Achromatopsia (no color) | #575757 | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B4ABC
#3B4ABC
oklch(46.8% 0.178 271.8)
- #6E5800
#6E5800
oklch(46.9% 0.096 91.9)
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 #3B4ABC, 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 0.043
- Blue With A Hint Of Purple #533CC6 ΔE 0.044
- Blurple #5539CC ΔE 0.053
- Bluey Purple #6241C7 ΔE 0.061
- Warm Blue #4B57DB ΔE 0.062
- Sapphire #2138AB ΔE 0.063
- Blueberry #464196 ΔE 0.065
Use #3B4ABC 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.