#2557BC
Closest named color: Blue Blue (#2242C7). oklch(48.4% 0.168 262.3), rgb(37, 87, 188).
Aa
White text reads best on this color (6.62:1).
About this color
#2557BC is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.168 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.053 away. White text reads best on it, at 6.62:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.168) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.16:1 |
| White text | 6.62:1 |
Values
| HEX | #2557BC |
| RGB | rgb(37, 87, 188) |
| HSL | hsl(220, 67%, 44%) |
| OKLCH | oklch(48.4% 0.168 262.3) |
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 #2557BC | 6.62:1 | AA | Lc -87.3 | Fine for body text |
| Black text on #2557BC | 3.16:1 | AA large text | Lc 21.8 | Dividers and decoration only |
| #2557BC text on white | 6.62:1 | AA | Lc 82.2 | Fine for body text |
| #2557BC text on black | 3.16:1 | AA large text | Lc -19.7 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EAFA
oklch(93.5% 0.024 262.1)
-
Step 200
200
#C9DAF8
oklch(88.5% 0.045 261.9)
-
Step 300
300
#A4C1F6
oklch(80.8% 0.082 262.3)
-
Step 400
400
#749FF2
oklch(70.7% 0.131 262.7)
-
Step 500
500
#5085ED
oklch(63.2% 0.166 262.3)
-
Step 600
600
#346CDB
oklch(55.6% 0.18 262.1)
-
Step 700
700 (this color)
#2557BC
oklch(48.4% 0.168 262.3)
-
Step 800
800
#21499A
oklch(42.6% 0.14 262.4)
-
Step 900
900
#203E7A
oklch(37.6% 0.108 262.4)
-
Step 950
950
#132548
oklch(27% 0.069 262.3)
#2557BC 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) | #0064C0 | 0.034 |
| Deuteranopia (no green cones) | #0056BA | 0.018 |
| Tritanopia (no blue cones) | #007081 | 0.131 |
| Achromatopsia (no color) | #5D5D5D | 0.169 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2557BC
#2557BC
oklch(48.4% 0.168 262.3)
- #7A5800
#7A5800
oklch(48.3% 0.1 82.4)
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 #2557BC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.053
- Mid Blue #276AB3 ΔE 0.055
- Warm Blue #4B57DB ΔE 0.064
- French Blue #436BAD ΔE 0.072
- Denim Blue #3B5B92 ΔE 0.072
- Majorelle Blue #3F37C9 ΔE 0.073
- Iris #6258C4 ΔE 0.075
- Azul #1D5DEC ΔE 0.075
Use #2557BC 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.