#3551C0
Closest named color: Blue Blue (#2242C7). oklch(48.2% 0.177 268.2), rgb(53, 81, 192).
Aa
White text reads best on this color (6.79:1).
About this color
#3551C0 is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.177 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.043 away. White text reads best on it, at 6.79:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.177) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.08:1 |
| White text | 6.79:1 |
Values
| HEX | #3551C0 |
| RGB | rgb(53, 81, 192) |
| HSL | hsl(228, 57%, 48%) |
| OKLCH | oklch(48.2% 0.177 268.2) |
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 #3551C0 | 6.79:1 | AA | Lc -88.0 | Fine for body text |
| Black text on #3551C0 | 3.08:1 | AA large text | Lc 21.1 | Dividers and decoration only |
| #3551C0 text on white | 6.79:1 | AA | Lc 83.0 | Fine for body text |
| #3551C0 text on black | 3.08:1 | AA large text | Lc -19.0 | 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
#E3EAFB
oklch(93.7% 0.024 267.9)
-
Step 200
200
#CCD9FA
oklch(88.6% 0.048 268.4)
-
Step 300
300
#A9BFF9
oklch(80.9% 0.086 268.4)
-
Step 400
400
#7C9CF6
oklch(70.7% 0.137 268)
-
Step 500
500
#5D80F2
oklch(63.1% 0.175 268.2)
-
Step 600
600
#4566E1
oklch(55.6% 0.191 268.2)
-
Step 700
700 (this color)
#3551C0
oklch(48.2% 0.177 268.2)
-
Step 800
800
#2E459E
oklch(42.6% 0.147 268.5)
-
Step 900
900
#283B7D
oklch(37.6% 0.114 268.4)
-
Step 950
950
#172349
oklch(26.8% 0.072 268.1)
#3551C0 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) | #0062C4 | 0.046 |
| Deuteranopia (no green cones) | #0055BE | 0.031 |
| Tritanopia (no blue cones) | #006D80 | 0.143 |
| Achromatopsia (no color) | #5B5B5B | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3551C0
#3551C0
oklch(48.2% 0.177 268.2)
- #755A00
#755A00
oklch(48.2% 0.098 88.3)
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 #3551C0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.043
- Warm Blue #4B57DB ΔE 0.053
- Majorelle Blue #3F37C9 ΔE 0.055
- Blue With A Hint Of Purple #533CC6 ΔE 0.056
- Blurple #5539CC ΔE 0.063
- Iris #6258C4 ΔE 0.066
- Bluey Purple #6241C7 ΔE 0.069
- Mid Blue #276AB3 ΔE 0.070
Use #3551C0 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.