#1D52B8
Closest named color: Blue Blue (#2242C7). oklch(46.8% 0.171 261.8), rgb(29, 82, 184).
Aa
White text reads best on this color (7.11:1).
About this color
#1D52B8 is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.171 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.043 away. White text reads best on it, at 7.11:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.171) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.95:1 |
| White text | 7.11:1 |
Values
| HEX | #1D52B8 |
| RGB | rgb(29, 82, 184) |
| HSL | hsl(219, 73%, 42%) |
| OKLCH | oklch(46.8% 0.171 261.8) |
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 #1D52B8 | 7.11:1 | AAA | Lc -89.0 | Fine for body text |
| Black text on #1D52B8 | 2.95:1 | Fails | Lc 20.0 | Dividers and decoration only |
| #1D52B8 text on white | 7.11:1 | AAA | Lc 84.1 | Fine for body text |
| #1D52B8 text on black | 2.95:1 | Fails | Lc -17.9 | 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
#E1EAFA
oklch(93.5% 0.024 262.1)
-
Step 200
200
#C9DAF8
oklch(88.5% 0.045 261.9)
-
Step 300
300
#A3C1F7
oklch(80.8% 0.084 262)
-
Step 400
400
#729FF3
oklch(70.6% 0.133 262.1)
-
Step 500
500
#4D85EE
oklch(63.1% 0.169 261.7)
-
Step 600
600
#316CDD
oklch(55.7% 0.184 261.7)
-
Step 700
700 (this color)
#1D52B8
oklch(46.8% 0.171 261.8)
-
Step 800
800
#1F499B
oklch(42.6% 0.142 261.9)
-
Step 900
900
#1E3E7B
oklch(37.6% 0.111 261.8)
-
Step 950
950
#122548
oklch(27% 0.07 261.5)
#1D52B8 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) | #005FBC | 0.033 |
| Deuteranopia (no green cones) | #0051B6 | 0.013 |
| Tritanopia (no blue cones) | #006B7D | 0.130 |
| Achromatopsia (no color) | #585858 | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D52B8
#1D52B8
oklch(46.8% 0.171 261.8)
- #755400
#755400
oklch(46.9% 0.097 82.2)
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 #1D52B8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.043
- Sapphire #2138AB ΔE 0.065
- Majorelle Blue #3F37C9 ΔE 0.067
- Mid Blue #276AB3 ΔE 0.068
- Cobalt #1E488F ΔE 0.070
- Dusk Blue #26538D ΔE 0.070
- Denim Blue #3B5B92 ΔE 0.074
- Blueberry #464196 ΔE 0.075
Use #1D52B8 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.