#1C63CB
Closest named color: Mid Blue (#276AB3). oklch(51.9% 0.176 258.9), rgb(28, 99, 203).
Aa
White text reads best on this color (5.68:1).
About this color
#1C63CB is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.176 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.045 away. White text reads best on it, at 5.68:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.176) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.69:1 |
| White text | 5.68:1 |
Values
| HEX | #1C63CB |
| RGB | rgb(28, 99, 203) |
| HSL | hsl(216, 76%, 45%) |
| OKLCH | oklch(51.9% 0.176 258.9) |
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 #1C63CB | 5.68:1 | AA | Lc -83.1 | Fine for body text |
| Black text on #1C63CB | 3.69:1 | AA large text | Lc 26.3 | Dividers and decoration only |
| #1C63CB text on white | 5.68:1 | AA | Lc 77.8 | Fine for body text |
| #1C63CB text on black | 3.69:1 | AA large text | Lc -24.0 | 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
#E0EBFB
oklch(93.7% 0.025 257.6)
-
Step 200
200
#C7DBF9
oklch(88.6% 0.047 258.4)
-
Step 300
300
#A0C2F8
oklch(80.9% 0.085 259.5)
-
Step 400
400
#6BA1F5
oklch(70.8% 0.136 258.9)
-
Step 500
500
#4286F0
oklch(63% 0.174 259.1)
-
Step 600
600
#1F6DDF
oklch(55.5% 0.189 258.9)
-
Step 700
700 (this color)
#1C63CB
oklch(51.9% 0.176 258.9)
-
Step 800
800
#124B9D
oklch(42.8% 0.146 258.7)
-
Step 900
900
#173F7C
oklch(37.6% 0.113 258.9)
-
Step 950
950
#0F2649
oklch(27.2% 0.071 258.7)
#1C63CB 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) | #1B6FCF | 0.032 |
| Deuteranopia (no green cones) | #005FC9 | 0.016 |
| Tritanopia (no blue cones) | #007D8D | 0.136 |
| Achromatopsia (no color) | #676767 | 0.176 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C63CB
#1C63CB
oklch(51.9% 0.176 258.9)
- #896000
#896000
oklch(51.9% 0.108 79.5)
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 #1C63CB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.045
- Royal Blue #4169E1 ΔE 0.049
- Azul #1D5DEC ΔE 0.053
- Warm Blue #4B57DB ΔE 0.053
- Cerulean Blue #056EEE ΔE 0.058
- French Blue #436BAD ΔE 0.063
- Neon Blue #4361EE ΔE 0.064
- Windows Blue #3778BF ΔE 0.068
Use #1C63CB 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.