#3763D7
Closest named color: Royal Blue (#4169E1). oklch(53.6% 0.185 265), rgb(55, 99, 215).
Aa
White text reads best on this color (5.34:1).
About this color
#3763D7 is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.185 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.024 away. White text reads best on it, at 5.34:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.185) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 3.92:1 |
| White text | 5.34:1 |
Values
| HEX | #3763D7 |
| RGB | rgb(55, 99, 215) |
| HSL | hsl(224, 67%, 53%) |
| OKLCH | oklch(53.6% 0.185 265) |
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 #3763D7 | 5.34:1 | AA | Lc -81.5 | Fine for body text |
| Black text on #3763D7 | 3.92:1 | AA large text | Lc 28.0 | Dividers and decoration only |
| #3763D7 text on white | 5.34:1 | AA | Lc 76.1 | Fine for body text |
| #3763D7 text on black | 3.92:1 | AA large text | Lc -25.6 | 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 600.
-
Step 50
50
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CAD9F9
oklch(88.4% 0.047 265.5)
-
Step 300
300
#A6C0F7
oklch(80.8% 0.083 264.9)
-
Step 400
400
#789EF4
oklch(70.8% 0.133 265.1)
-
Step 500
500
#5683EF
oklch(63.2% 0.169 264.9)
-
Step 600
600 (this color)
#3763D7
oklch(53.6% 0.185 265)
-
Step 700
700
#2F57C1
oklch(49.2% 0.172 265)
-
Step 800
800
#27489C
oklch(42.8% 0.143 264.8)
-
Step 900
900
#243D7C
oklch(37.7% 0.111 265.2)
-
Step 950
950
#152448
oklch(26.9% 0.07 265)
#3763D7 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) | #0073DB | 0.043 |
| Deuteranopia (no green cones) | #0064D5 | 0.028 |
| Tritanopia (no blue cones) | #007F93 | 0.146 |
| Achromatopsia (no color) | #6B6B6B | 0.185 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3763D7
#3763D7
oklch(53.6% 0.185 265)
- #8B6700
#8B6700
oklch(53.6% 0.11 84.4)
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 #3763D7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.024
- Warm Blue #4B57DB ΔE 0.033
- Neon Blue #4361EE ΔE 0.038
- Azul #1D5DEC ΔE 0.041
- Cerulean Blue #056EEE ΔE 0.045
- Dark Periwinkle #665FD1 ΔE 0.057
- Bright Blue #0165FC ΔE 0.060
- Iris #6258C4 ΔE 0.061
Use #3763D7 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.