#1B48B4
Closest named color: Blue Blue (#2242C7). oklch(44.4% 0.178 263.6), rgb(27, 72, 180).
Aa
White text reads best on this color (7.97:1).
About this color
#1B48B4 is a dark, vivid blue. In OKLCH its lightness is 44%, its chroma 0.178 and its hue 264°. 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 7.97:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | vivid (0.178) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.63:1 |
| White text | 7.97:1 |
Values
| HEX | #1B48B4 |
| RGB | rgb(27, 72, 180) |
| HSL | hsl(222, 74%, 41%) |
| OKLCH | oklch(44.4% 0.178 263.6) |
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 #1B48B4 | 7.97:1 | AAA | Lc -91.7 | Preferred for body text |
| Black text on #1B48B4 | 2.63:1 | Fails | Lc 17.1 | Dividers and decoration only |
| #1B48B4 text on white | 7.97:1 | AAA | Lc 87.0 | Fine for body text |
| #1B48B4 text on black | 2.63:1 | Fails | Lc -15.1 | 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
#4881FF
oklch(63.2% 0.197 263.5)
-
Step 600
600
#2562F8
oklch(55.5% 0.233 263.7)
-
Step 700
700
#1950D8
oklch(49.1% 0.216 263.6)
-
Step 800
800 (this color)
#1B48B4
oklch(44.4% 0.178 263.6)
-
Step 900
900
#183A8A
oklch(37.7% 0.139 263.6)
-
Step 950
950
#0F2351
oklch(27.1% 0.088 263.8)
#1B48B4 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) | #0058B8 | 0.040 |
| Deuteranopia (no green cones) | #004AB2 | 0.012 |
| Tritanopia (no blue cones) | #006477 | 0.137 |
| Achromatopsia (no color) | #515151 | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B48B4
#1B48B4
oklch(44.4% 0.178 263.6)
- #6B4E00
#6B4E00
oklch(44.3% 0.091 83.8)
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 #1B48B4, 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 0.039
- Majorelle Blue #3F37C9 ΔE 0.056
- Cobalt #1E488F ΔE 0.060
- Blueberry #464196 ΔE 0.067
- Dusk Blue #26538D ΔE 0.073
- Blue With A Hint Of Purple #533CC6 ΔE 0.074
- Blurple #5539CC ΔE 0.081
Use #1B48B4 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.