#1D53A7
Closest named color: Dusk Blue (#26538D). oklch(45.7% 0.147 259.3), rgb(29, 83, 167).
Aa
White text reads best on this color (7.37:1).
About this color
#1D53A7 is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.147 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.043 away. White text reads best on it, at 7.37:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.147) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.84:1 |
| White text | 7.37:1 |
Values
| HEX | #1D53A7 |
| RGB | rgb(29, 83, 167) |
| HSL | hsl(217, 70%, 38%) |
| OKLCH | oklch(45.7% 0.147 259.3) |
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 #1D53A7 | 7.37:1 | AAA | Lc -90.0 | Preferred for body text |
| Black text on #1D53A7 | 2.84:1 | Fails | Lc 18.9 | Dividers and decoration only |
| #1D53A7 text on white | 7.37:1 | AAA | Lc 85.1 | Fine for body text |
| #1D53A7 text on black | 2.84:1 | Fails | Lc -16.9 | 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 800.
-
Step 50
50
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFB
oklch(93.7% 0.025 257.6)
-
Step 200
200
#C7DAF9
oklch(88.4% 0.048 260.2)
-
Step 300
300
#A0C2F8
oklch(80.9% 0.085 259.5)
-
Step 400
400
#6BA1F5
oklch(70.8% 0.136 258.9)
-
Step 500
500
#4286F1
oklch(63.1% 0.175 259.2)
-
Step 600
600
#216DE0
oklch(55.7% 0.19 259.3)
-
Step 700
700
#135AC3
oklch(49.1% 0.178 259.4)
-
Step 800
800 (this color)
#1D53A7
oklch(45.7% 0.147 259.3)
-
Step 900
900
#183F7D
oklch(37.7% 0.114 259.5)
-
Step 950
950
#0F2549
oklch(26.9% 0.073 259.8)
#1D53A7 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) | #1F5CAA | 0.025 |
| Deuteranopia (no green cones) | #0050A5 | 0.017 |
| Tritanopia (no blue cones) | #006775 | 0.112 |
| Achromatopsia (no color) | #565656 | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D53A7
#1D53A7
oklch(45.7% 0.147 259.3)
- #735000
#735000
oklch(45.7% 0.095 79.5)
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 #1D53A7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.043
- Cobalt #1E488F ΔE 0.047
- Denim Blue #3B5B92 ΔE 0.052
- Light Navy #155084 ΔE 0.058
- Light Navy Blue #2E5A88 ΔE 0.059
- Blueberry #464196 ΔE 0.063
- Deep Sea Blue #015482 ΔE 0.064
- Blue Blue #2242C7 ΔE 0.066
Use #1D53A7 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.