#3553B5
Closest named color: Blue Blue (#2242C7). oklch(47.7% 0.159 267.2), rgb(53, 83, 181).
Aa
White text reads best on this color (6.87:1).
About this color
#3553B5 is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.159 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.055 away. White text reads best on it, at 6.87:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.159) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.05:1 |
| White text | 6.87:1 |
Values
| HEX | #3553B5 |
| RGB | rgb(53, 83, 181) |
| HSL | hsl(226, 55%, 46%) |
| OKLCH | oklch(47.7% 0.159 267.2) |
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 #3553B5 | 6.87:1 | AA | Lc -88.3 | Fine for body text |
| Black text on #3553B5 | 3.05:1 | AA large text | Lc 20.7 | Dividers and decoration only |
| #3553B5 text on white | 6.87:1 | AA | Lc 83.3 | Fine for body text |
| #3553B5 text on black | 3.05:1 | AA large text | Lc -18.6 | 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 700.
-
Step 50
50
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CCD9F6
oklch(88.5% 0.042 266.3)
-
Step 300
300
#AAC0F3
oklch(80.9% 0.076 266.5)
-
Step 400
400
#7E9DEE
oklch(70.6% 0.124 267.3)
-
Step 500
500
#5F83E8
oklch(63.2% 0.157 267.1)
-
Step 600
600
#476AD6
oklch(55.7% 0.171 267.2)
-
Step 700
700 (this color)
#3553B5
oklch(47.7% 0.159 267.2)
-
Step 800
800
#2F4896
oklch(42.7% 0.131 267.3)
-
Step 900
900
#293D78
oklch(37.7% 0.104 267.2)
-
Step 950
950
#182446
oklch(26.9% 0.065 267.3)
#3553B5 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) | #0660B8 | 0.039 |
| Deuteranopia (no green cones) | #0055B3 | 0.032 |
| Tritanopia (no blue cones) | #006B7C | 0.129 |
| Achromatopsia (no color) | #5A5A5A | 0.160 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3553B5
#3553B5
oklch(47.7% 0.159 267.2)
- #745800
#745800
oklch(47.6% 0.097 87.1)
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 #3553B5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.055
- Mid Blue #276AB3 ΔE 0.062
- Denim Blue #3B5B92 ΔE 0.064
- Blueberry #464196 ΔE 0.066
- Blue With A Hint Of Purple #533CC6 ΔE 0.066
- Warm Blue #4B57DB ΔE 0.067
- Majorelle Blue #3F37C9 ΔE 0.067
- Dusk Blue #26538D ΔE 0.068
Use #3553B5 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.