#1F52B3
Closest named color: Blue Blue (#2242C7). oklch(46.4% 0.164 261.6), rgb(31, 82, 179).
Aa
White text reads best on this color (7.20:1).
About this color
#1F52B3 is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.164 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.049 away. White text reads best on it, at 7.20:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.164) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.91:1 |
| White text | 7.20:1 |
Values
| HEX | #1F52B3 |
| RGB | rgb(31, 82, 179) |
| HSL | hsl(219, 70%, 41%) |
| OKLCH | oklch(46.4% 0.164 261.6) |
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 #1F52B3 | 7.20:1 | AAA | Lc -89.4 | Fine for body text |
| Black text on #1F52B3 | 2.91:1 | Fails | Lc 19.6 | Dividers and decoration only |
| #1F52B3 text on white | 7.20:1 | AAA | Lc 84.4 | Fine for body text |
| #1F52B3 text on black | 2.91:1 | Fails | Lc -17.5 | 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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAFA
oklch(93.6% 0.023 264.5)
-
Step 200
200
#C9DAF7
oklch(88.5% 0.044 261.2)
-
Step 300
300
#A4C1F5
oklch(80.8% 0.081 261.9)
-
Step 400
400
#74A0EF
oklch(70.7% 0.126 261.5)
-
Step 500
500
#5086EA
oklch(63.2% 0.161 261.6)
-
Step 600
600
#346DD9
oklch(55.7% 0.177 261.6)
-
Step 700
700 (this color)
#1F52B3
oklch(46.4% 0.164 261.6)
-
Step 800
800
#214A98
oklch(42.7% 0.136 261.7)
-
Step 900
900
#203F79
oklch(37.8% 0.106 261.6)
-
Step 950
950
#132547
oklch(26.9% 0.068 261.9)
#1F52B3 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) | #005EB6 | 0.031 |
| Deuteranopia (no green cones) | #0051B1 | 0.015 |
| Tritanopia (no blue cones) | #006A7A | 0.127 |
| Achromatopsia (no color) | #575757 | 0.164 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F52B3
#1F52B3
oklch(46.4% 0.164 261.6)
- #745300
#745300
oklch(46.5% 0.096 81.9)
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 #1F52B3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.049
- Dusk Blue #26538D ΔE 0.062
- Cobalt #1E488F ΔE 0.063
- Sapphire #2138AB ΔE 0.064
- Mid Blue #276AB3 ΔE 0.067
- Denim Blue #3B5B92 ΔE 0.067
- Blueberry #464196 ΔE 0.069
- Majorelle Blue #3F37C9 ΔE 0.070
Use #1F52B3 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.