#2563EA
Closest named color: Azul (#1D5DEC). oklch(54.5% 0.214 262.8), rgb(37, 99, 234).
Aa
White text reads best on this color (5.18:1).
About this color
#2563EA is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.214 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Azul (#1D5DEC), ΔE 0.016 away. White text reads best on it, at 5.18:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.214) |
| Temperature | cool |
| Nearest name | Azul (#1D5DEC) |
| Black text | 4.05:1 |
| White text | 5.18:1 |
Values
| HEX | #2563EA |
| RGB | rgb(37, 99, 234) |
| HSL | hsl(221, 82%, 53%) |
| OKLCH | oklch(54.5% 0.214 262.8) |
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 #2563EA | 5.18:1 | AA | Lc -80.3 | Fine for body text |
| Black text on #2563EA | 4.05:1 | AA large text | Lc 29.1 | Dividers and decoration only |
| #2563EA text on white | 5.18:1 | AA | Lc 75.0 | Content text, not long reading |
| #2563EA text on black | 4.05:1 | AA large text | Lc -26.8 | 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 600.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EAFD
oklch(93.5% 0.028 263.4)
-
Step 200
200
#C7DAFD
oklch(88.5% 0.053 262.7)
-
Step 300
300
#A0C1FF
oklch(80.9% 0.095 262.7)
-
Step 400
400
#6D9EFF
oklch(70.8% 0.152 262.8)
-
Step 500
500
#4581FE
oklch(63% 0.197 262.8)
-
Step 600
600 (this color)
#2563EA
oklch(54.5% 0.214 262.8)
-
Step 700
700
#1C54CF
oklch(49.1% 0.199 262.9)
-
Step 800
800
#1946A7
oklch(42.8% 0.164 262.8)
-
Step 900
900
#1A3C84
oklch(37.7% 0.128 262.8)
-
Step 950
950
#10244E
oklch(27.1% 0.082 263)
#2563EA 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) | #0076EF | 0.045 |
| Deuteranopia (no green cones) | #0064E7 | 0.014 |
| Tritanopia (no blue cones) | #00859D | 0.163 |
| Achromatopsia (no color) | #6D6D6D | 0.214 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2563EA
#2563EA
oklch(54.5% 0.214 262.8)
- #906900
#906900
oklch(54.6% 0.112 82.9)
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 #2563EA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Azul #1D5DEC ΔE 0.016
- Neon Blue #4361EE ΔE 0.025
- Cerulean Blue #056EEE ΔE 0.026
- Bright Blue #0165FC ΔE 0.029
- Royal Blue #4169E1 ΔE 0.032
- Warm Blue #4B57DB ΔE 0.045
- Electric Blue #0652FF ΔE 0.051
- Clear Blue #247AFD ΔE 0.062
Use #2563EA 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.