#3872DD
Closest named color: Royal Blue (#4169E1). oklch(57.2% 0.175 261.3), rgb(56, 114, 221).
Aa
Black text reads best on this color (4.61:1).
About this color
#3872DD is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.175 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.024 away. Black text reads best on it, at 4.61:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.175) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.61:1 |
| White text | 4.54:1 |
Values
| HEX | #3872DD |
| RGB | rgb(56, 114, 221) |
| HSL | hsl(219, 71%, 54%) |
| OKLCH | oklch(57.2% 0.175 261.3) |
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 #3872DD | 4.54:1 | AA | Lc -76.6 | Fine for body text |
| Black text on #3872DD | 4.61:1 | AA | Lc 32.9 | Non-text elements, placeholder text |
| #3872DD text on white | 4.54:1 | AA | Lc 71.1 | Content text, not long reading |
| #3872DD text on black | 4.61:1 | AA | Lc -30.5 | Non-text elements, placeholder text |
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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAFA
oklch(93.6% 0.023 264.5)
-
Step 200
200
#C9DAF7
oklch(88.5% 0.044 261.2)
-
Step 300
300
#A4C2F4
oklch(81% 0.078 260.5)
-
Step 400
400
#74A0EF
oklch(70.7% 0.126 261.5)
-
Step 500
500
#4F86E9
oklch(63.1% 0.16 261.2)
-
Step 600
600 (this color)
#3872DD
oklch(57.2% 0.175 261.3)
-
Step 700
700
#265ABB
oklch(49% 0.163 261.4)
-
Step 800
800
#214A97
oklch(42.6% 0.135 261.5)
-
Step 900
900
#203F78
oklch(37.7% 0.104 261.4)
-
Step 950
950
#132546
oklch(26.9% 0.066 261.5)
#3872DD 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) | #357EE1 | 0.031 |
| Deuteranopia (no green cones) | #006FDB | 0.028 |
| Tritanopia (no blue cones) | #008C9D | 0.138 |
| Achromatopsia (no color) | #767676 | 0.175 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3872DD
#3872DD
oklch(57.2% 0.175 261.3)
- #9B6F00
#9B6F00
oklch(57.2% 0.118 81)
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 #3872DD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.024
- Cerulean Blue #056EEE ΔE 0.037
- Neon Blue #4361EE ΔE 0.050
- Clear Blue #247AFD ΔE 0.050
- Windows Blue #3778BF ΔE 0.052
- Azul #1D5DEC ΔE 0.063
- Warm Blue #4B57DB ΔE 0.064
- Bright Blue #0165FC ΔE 0.065
Use #3872DD 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.