#1D52A8
Closest named color: Dusk Blue (#26538D). oklch(45.5% 0.149 259.9), rgb(29, 82, 168).
Aa
White text reads best on this color (7.43:1).
About this color
#1D52A8 is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.149 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.045 away. White text reads best on it, at 7.43:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.149) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.82:1 |
| White text | 7.43:1 |
Values
| HEX | #1D52A8 |
| RGB | rgb(29, 82, 168) |
| HSL | hsl(217, 71%, 39%) |
| OKLCH | oklch(45.5% 0.149 259.9) |
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 #1D52A8 | 7.43:1 | AAA | Lc -90.2 | Preferred for body text |
| Black text on #1D52A8 | 2.82:1 | Fails | Lc 18.7 | Dividers and decoration only |
| #1D52A8 text on white | 7.43:1 | AAA | Lc 85.3 | Fine for body text |
| #1D52A8 text on black | 2.82:1 | Fails | Lc -16.7 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFB
oklch(93.7% 0.025 257.6)
-
Step 200
200
#C7DAFA
oklch(88.4% 0.049 260.9)
-
Step 300
300
#A0C2F9
oklch(80.9% 0.087 259.9)
-
Step 400
400
#6BA0F7
oklch(70.7% 0.14 259.9)
-
Step 500
500
#4385F3
oklch(63% 0.178 260)
-
Step 600
600
#226CE2
oklch(55.6% 0.194 259.9)
-
Step 700
700
#1459C4
oklch(49% 0.18 259.8)
-
Step 800
800 (this color)
#1D52A8
oklch(45.5% 0.149 259.9)
-
Step 900
900
#183F7E
oklch(37.8% 0.116 259.7)
-
Step 950
950
#0F254A
oklch(27% 0.074 260.2)
#1D52A8 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) | #1A5CAB | 0.027 |
| Deuteranopia (no green cones) | #004FA6 | 0.017 |
| Tritanopia (no blue cones) | #006775 | 0.115 |
| Achromatopsia (no color) | #555555 | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D52A8
#1D52A8
oklch(45.5% 0.149 259.9)
- #725000
#725000
oklch(45.6% 0.094 80.3)
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 #1D52A8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.045
- Cobalt #1E488F ΔE 0.047
- Denim Blue #3B5B92 ΔE 0.055
- Light Navy #155084 ΔE 0.060
- Blueberry #464196 ΔE 0.062
- Light Navy Blue #2E5A88 ΔE 0.062
- Blue Blue #2242C7 ΔE 0.063
- Sapphire #2138AB ΔE 0.064
Use #1D52A8 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.