#3551AC
Closest named color: Blueberry (#464196). oklch(46.6% 0.149 267.4), rgb(53, 81, 172).
Aa
White text reads best on this color (7.18:1).
About this color
#3551AC is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.149 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.053 away. White text reads best on it, at 7.18:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.149) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.92:1 |
| White text | 7.18:1 |
Values
| HEX | #3551AC |
| RGB | rgb(53, 81, 172) |
| HSL | hsl(226, 53%, 44%) |
| OKLCH | oklch(46.6% 0.149 267.4) |
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 #3551AC | 7.18:1 | AAA | Lc -89.5 | Fine for body text |
| Black text on #3551AC | 2.92:1 | Fails | Lc 19.5 | Dividers and decoration only |
| #3551AC text on white | 7.18:1 | AAA | Lc 84.6 | Fine for body text |
| #3551AC text on black | 2.92:1 | Fails | Lc -17.4 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E4EAF8
oklch(93.7% 0.02 267.3)
-
Step 200
200
#CDD9F5
oklch(88.5% 0.041 267.1)
-
Step 300
300
#ACC0F0
oklch(80.9% 0.072 267.1)
-
Step 400
400
#819EE9
oklch(70.8% 0.115 267.3)
-
Step 500
500
#6283E2
oklch(63% 0.148 267.6)
-
Step 600
600
#4A6BD0
oklch(55.6% 0.16 267.4)
-
Step 700
700 (this color)
#3551AC
oklch(46.6% 0.149 267.4)
-
Step 800
800
#314992
oklch(42.7% 0.124 267.3)
-
Step 900
900
#2B3E74
oklch(37.8% 0.095 267.2)
-
Step 950
950
#192444
oklch(26.9% 0.062 267.8)
#3551AC 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) | #155DAF | 0.036 |
| Deuteranopia (no green cones) | #0052AA | 0.033 |
| Tritanopia (no blue cones) | #006776 | 0.123 |
| Achromatopsia (no color) | #575757 | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3551AC
#3551AC
oklch(46.6% 0.149 267.4)
- #705500
#705500
oklch(46.5% 0.095 87.2)
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 #3551AC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.053
- Dusk Blue #26538D ΔE 0.054
- Denim Blue #3B5B92 ΔE 0.055
- Cobalt #1E488F ΔE 0.059
- Blue Blue #2242C7 ΔE 0.061
- Twilight #4E518B ΔE 0.062
- Dusky Blue #475F94 ΔE 0.064
- Mid Blue #276AB3 ΔE 0.066
Use #3551AC 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.