#2563C5
Closest named color: Mid Blue (#276AB3). oklch(51.6% 0.166 259.5), rgb(37, 99, 197).
Aa
White text reads best on this color (5.72:1).
About this color
#2563C5 is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.166 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.036 away. White text reads best on it, at 5.72:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.166) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.66:1 |
| White text | 5.72:1 |
Values
| HEX | #2563C5 |
| RGB | rgb(37, 99, 197) |
| HSL | hsl(217, 68%, 46%) |
| OKLCH | oklch(51.6% 0.166 259.5) |
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 #2563C5 | 5.72:1 | AA | Lc -83.4 | Fine for body text |
| Black text on #2563C5 | 3.66:1 | AA large text | Lc 26.0 | Dividers and decoration only |
| #2563C5 text on white | 5.72:1 | AA | Lc 78.1 | Fine for body text |
| #2563C5 text on black | 3.66:1 | AA large text | Lc -23.7 | 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
#E1EBFA
oklch(93.7% 0.023 258.4)
-
Step 200
200
#C8DAF7
oklch(88.4% 0.045 259.9)
-
Step 300
300
#A2C2F5
oklch(80.9% 0.081 259.6)
-
Step 400
400
#6FA1F0
oklch(70.7% 0.128 259.2)
-
Step 500
500
#4987EB
oklch(63.2% 0.164 259.5)
-
Step 600
600
#2A6ED9
oklch(55.6% 0.178 259.5)
-
Step 700
700 (this color)
#2563C5
oklch(51.6% 0.166 259.5)
-
Step 800
800
#1A4B98
oklch(42.6% 0.137 259.4)
-
Step 900
900
#1C4079
oklch(37.8% 0.106 259.3)
-
Step 950
950
#112647
oklch(27.1% 0.067 259.1)
#2563C5 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) | #266EC9 | 0.030 |
| Deuteranopia (no green cones) | #005FC3 | 0.020 |
| Tritanopia (no blue cones) | #007B8A | 0.129 |
| Achromatopsia (no color) | #666666 | 0.166 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2563C5
#2563C5
oklch(51.6% 0.166 259.5)
- #885F00
#885F00
oklch(51.5% 0.107 79.2)
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 #2563C5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.036
- Royal Blue #4169E1 ΔE 0.053
- French Blue #436BAD ΔE 0.054
- Warm Blue #4B57DB ΔE 0.056
- Azul #1D5DEC ΔE 0.063
- Windows Blue #3778BF ΔE 0.064
- Cerulean Blue #056EEE ΔE 0.066
- Iris #6258C4 ΔE 0.069
Use #2563C5 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.