#2553B0
Closest named color: Blue Blue (#2242C7). oklch(46.6% 0.157 262.3), rgb(37, 83, 176).
Aa
White text reads best on this color (7.13:1).
About this color
#2553B0 is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.157 and its hue 262°. 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 7.13:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.157) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.94:1 |
| White text | 7.13:1 |
Values
| HEX | #2553B0 |
| RGB | rgb(37, 83, 176) |
| HSL | hsl(220, 65%, 42%) |
| OKLCH | oklch(46.6% 0.157 262.3) |
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 #2553B0 | 7.13:1 | AAA | Lc -89.2 | Fine for body text |
| Black text on #2553B0 | 2.94:1 | Fails | Lc 19.8 | Dividers and decoration only |
| #2553B0 text on white | 7.13:1 | AAA | Lc 84.3 | Fine for body text |
| #2553B0 text on black | 2.94:1 | Fails | Lc -17.7 | 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
#CADAF6
oklch(88.5% 0.042 261.7)
-
Step 300
300
#A6C1F3
oklch(80.8% 0.077 262.6)
-
Step 400
400
#77A0EC
oklch(70.8% 0.121 262.1)
-
Step 500
500
#5486E6
oklch(63.1% 0.155 262.2)
-
Step 600
600
#396DD5
oklch(55.6% 0.17 262.3)
-
Step 700
700 (this color)
#2553B0
oklch(46.6% 0.157 262.3)
-
Step 800
800
#254A95
oklch(42.6% 0.131 262.5)
-
Step 900
900
#233F77
oklch(37.7% 0.102 262.6)
-
Step 950
950
#152545
oklch(26.9% 0.064 262.8)
#2553B0 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) | #0F5FB3 | 0.032 |
| Deuteranopia (no green cones) | #0052AE | 0.019 |
| Tritanopia (no blue cones) | #006A79 | 0.123 |
| Achromatopsia (no color) | #585858 | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2553B0
#2553B0
oklch(46.6% 0.157 262.3)
- #745300
#745300
oklch(46.5% 0.096 81.9)
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 #2553B0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.055
- Dusk Blue #26538D ΔE 0.057
- Denim Blue #3B5B92 ΔE 0.060
- Cobalt #1E488F ΔE 0.061
- Mid Blue #276AB3 ΔE 0.063
- Blueberry #464196 ΔE 0.066
- Sapphire #2138AB ΔE 0.067
- Light Navy Blue #2E5A88 ΔE 0.071
Use #2553B0 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.