#1C4CB3
Closest named color: Blue Blue (#2242C7). oklch(45.1% 0.172 262.7), rgb(28, 76, 179).
Aa
White text reads best on this color (7.68:1).
About this color
#1C4CB3 is a medium-dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.172 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.039 away. White text reads best on it, at 7.68:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | vivid (0.172) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.73:1 |
| White text | 7.68:1 |
Values
| HEX | #1C4CB3 |
| RGB | rgb(28, 76, 179) |
| HSL | hsl(221, 73%, 41%) |
| OKLCH | oklch(45.1% 0.172 262.7) |
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 #1C4CB3 | 7.68:1 | AAA | Lc -90.9 | Preferred for body text |
| Black text on #1C4CB3 | 2.73:1 | Fails | Lc 18.0 | Dividers and decoration only |
| #1C4CB3 text on white | 7.68:1 | AAA | Lc 86.0 | Fine for body text |
| #1C4CB3 text on black | 2.73:1 | Fails | Lc -16.0 | 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 800.
-
Step 50
50
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFE
oklch(93.6% 0.029 264.4)
-
Step 200
200
#C6DAFF
oklch(88.5% 0.056 262.8)
-
Step 300
300
#A0C1FF
oklch(80.9% 0.095 262.7)
-
Step 400
400
#6C9EFF
oklch(70.7% 0.152 262.5)
-
Step 500
500
#4581FF
oklch(63.1% 0.198 262.9)
-
Step 600
600
#2365F3
oklch(55.6% 0.223 262.7)
-
Step 700
700
#1752D4
oklch(49.1% 0.209 262.8)
-
Step 800
800 (this color)
#1C4CB3
oklch(45.1% 0.172 262.7)
-
Step 900
900
#173B87
oklch(37.6% 0.134 262.7)
-
Step 950
950
#0E244F
oklch(27.1% 0.084 262)
#1C4CB3 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) | #005AB7 | 0.035 |
| Deuteranopia (no green cones) | #004CB1 | 0.013 |
| Tritanopia (no blue cones) | #006678 | 0.132 |
| Achromatopsia (no color) | #535353 | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C4CB3
#1C4CB3
oklch(45.1% 0.172 262.7)
- #6F5000
#6F5000
oklch(45.2% 0.093 82.7)
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 #1C4CB3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.039
- Sapphire #2138AB ΔE 0.048
- Cobalt #1E488F ΔE 0.059
- Majorelle Blue #3F37C9 ΔE 0.062
- Blueberry #464196 ΔE 0.066
- Dusk Blue #26538D ΔE 0.067
- Blue With A Hint Of Purple #533CC6 ΔE 0.075
- Denim Blue #3B5B92 ΔE 0.078
Use #1C4CB3 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.