#1C4AB5
Closest named color: Blue Blue (#2242C7). oklch(44.9% 0.177 263.4), rgb(28, 74, 181).
Aa
White text reads best on this color (7.78:1).
About this color
#1C4AB5 is a dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.177 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.033 away. White text reads best on it, at 7.78:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | vivid (0.177) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.69:1 |
| White text | 7.78:1 |
Values
| HEX | #1C4AB5 |
| RGB | rgb(28, 74, 181) |
| HSL | hsl(222, 73%, 41%) |
| OKLCH | oklch(44.9% 0.177 263.4) |
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 #1C4AB5 | 7.78:1 | AAA | Lc -91.2 | Preferred for body text |
| Black text on #1C4AB5 | 2.69:1 | Fails | Lc 17.6 | Dividers and decoration only |
| #1C4AB5 text on white | 7.78:1 | AAA | Lc 86.4 | Fine for body text |
| #1C4AB5 text on black | 2.69:1 | Fails | Lc -15.7 | 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 800.
-
Step 50
50
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFF
oklch(93.6% 0.03 265.3)
-
Step 200
200
#C6DAFF
oklch(88.5% 0.056 262.8)
-
Step 300
300
#A1C1FF
oklch(81% 0.095 263.3)
-
Step 400
400
#6E9DFF
oklch(70.6% 0.153 263.6)
-
Step 500
500
#4781FF
oklch(63.2% 0.197 263.3)
-
Step 600
600
#2463F7
oklch(55.6% 0.23 263.3)
-
Step 700
700
#1851D7
oklch(49.2% 0.213 263.3)
-
Step 800
800 (this color)
#1C4AB5
oklch(44.9% 0.177 263.4)
-
Step 900
900
#183A89
oklch(37.6% 0.138 263.6)
-
Step 950
950
#0F2350
oklch(27% 0.087 263.6)
#1C4AB5 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) | #0059B9 | 0.037 |
| Deuteranopia (no green cones) | #004BB3 | 0.013 |
| Tritanopia (no blue cones) | #006578 | 0.136 |
| Achromatopsia (no color) | #525252 | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C4AB5
#1C4AB5
oklch(44.9% 0.177 263.4)
- #6D4F00
#6D4F00
oklch(44.8% 0.092 83.3)
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 #1C4AB5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.033
- Sapphire #2138AB ΔE 0.044
- Majorelle Blue #3F37C9 ΔE 0.057
- Cobalt #1E488F ΔE 0.062
- Blueberry #464196 ΔE 0.068
- Dusk Blue #26538D ΔE 0.072
- Blue With A Hint Of Purple #533CC6 ΔE 0.073
- Blurple #5539CC ΔE 0.080
Use #1C4AB5 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.