#3751C4
Closest named color: Blue Blue (#2242C7). oklch(48.6% 0.182 268.9), rgb(55, 81, 196).
Aa
White text reads best on this color (6.69:1).
About this color
#3751C4 is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.182 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.044 away. White text reads best on it, at 6.69:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.182) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.13:1 |
| White text | 6.69:1 |
Values
| HEX | #3751C4 |
| RGB | rgb(55, 81, 196) |
| HSL | hsl(229, 56%, 49%) |
| OKLCH | oklch(48.6% 0.182 268.9) |
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 #3751C4 | 6.69:1 | AA | Lc -87.6 | Fine for body text |
| Black text on #3751C4 | 3.13:1 | AA large text | Lc 21.5 | Dividers and decoration only |
| #3751C4 text on white | 6.69:1 | AA | Lc 82.5 | Fine for body text |
| #3751C4 text on black | 3.13:1 | AA large text | Lc -19.4 | 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
#E3EAFC
oklch(93.7% 0.025 268.8)
-
Step 200
200
#CCD9FA
oklch(88.6% 0.048 268.4)
-
Step 300
300
#A9BFFA
oklch(80.9% 0.087 268.6)
-
Step 400
400
#7D9BF8
oklch(70.7% 0.141 269.1)
-
Step 500
500
#5E7FF5
oklch(63.2% 0.18 269)
-
Step 600
600
#4665E4
oklch(55.7% 0.196 268.8)
-
Step 700
700 (this color)
#3751C4
oklch(48.6% 0.182 268.9)
-
Step 800
800
#2E44A0
oklch(42.6% 0.151 268.9)
-
Step 900
900
#293B7F
oklch(37.8% 0.117 269)
-
Step 950
950
#18234A
oklch(27% 0.074 269.2)
#3751C4 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) | #0063C8 | 0.048 |
| Deuteranopia (no green cones) | #0056C2 | 0.033 |
| Tritanopia (no blue cones) | #006E82 | 0.147 |
| Achromatopsia (no color) | #5C5C5C | 0.182 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3751C4
#3751C4
oklch(48.6% 0.182 268.9)
- #765B00
#765B00
oklch(48.5% 0.099 88.5)
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 #3751C4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.044
- Warm Blue #4B57DB ΔE 0.047
- Blue With A Hint Of Purple #533CC6 ΔE 0.054
- Majorelle Blue #3F37C9 ΔE 0.054
- Blurple #5539CC ΔE 0.060
- Iris #6258C4 ΔE 0.063
- Bluey Purple #6241C7 ΔE 0.066
- Azul #1D5DEC ΔE 0.068
Use #3751C4 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.