#2552B2
Closest named color: Blue Blue (#2242C7). oklch(46.6% 0.161 262.8), rgb(37, 82, 178).
Aa
White text reads best on this color (7.17:1).
About this color
#2552B2 is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.161 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.051 away. White text reads best on it, at 7.17:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.161) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.92:1 |
| White text | 7.17:1 |
Values
| HEX | #2552B2 |
| RGB | rgb(37, 82, 178) |
| HSL | hsl(221, 66%, 42%) |
| OKLCH | oklch(46.6% 0.161 262.8) |
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 #2552B2 | 7.17:1 | AAA | Lc -89.3 | Fine for body text |
| Black text on #2552B2 | 2.92:1 | Fails | Lc 19.7 | Dividers and decoration only |
| #2552B2 text on white | 7.17:1 | AAA | Lc 84.4 | Fine for body text |
| #2552B2 text on black | 2.92:1 | Fails | Lc -17.6 | 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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CADAF7
oklch(88.5% 0.044 262.4)
-
Step 300
300
#A6C1F4
oklch(80.9% 0.078 262.9)
-
Step 400
400
#779FEE
oklch(70.6% 0.124 263.1)
-
Step 500
500
#5485E9
oklch(63.1% 0.16 263)
-
Step 600
600
#396CD7
oklch(55.5% 0.174 262.9)
-
Step 700
700 (this color)
#2552B2
oklch(46.6% 0.161 262.8)
-
Step 800
800
#254A97
oklch(42.7% 0.134 262.8)
-
Step 900
900
#233F78
oklch(37.8% 0.103 262.8)
-
Step 950
950
#152546
oklch(27% 0.065 263.2)
#2552B2 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) | #015EB5 | 0.032 |
| Deuteranopia (no green cones) | #0051B0 | 0.019 |
| Tritanopia (no blue cones) | #006A7A | 0.126 |
| Achromatopsia (no color) | #575757 | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2552B2
#2552B2
oklch(46.6% 0.161 262.8)
- #735300
#735300
oklch(46.4% 0.095 82.7)
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 #2552B2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.051
- Dusk Blue #26538D ΔE 0.061
- Cobalt #1E488F ΔE 0.062
- Denim Blue #3B5B92 ΔE 0.065
- Sapphire #2138AB ΔE 0.065
- Mid Blue #276AB3 ΔE 0.066
- Blueberry #464196 ΔE 0.066
- Majorelle Blue #3F37C9 ΔE 0.070
Use #2552B2 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.