#1A315D
Closest named color: Prussian Blue (#1D3557). oklch(32% 0.084 262), rgb(26, 49, 93).
Aa
White text reads best on this color (12.79:1).
About this color
#1A315D is a dark, moderately saturated blue. In OKLCH its lightness is 32%, its chroma 0.084 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.019 away. White text reads best on it, at 12.79:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.64:1 |
| White text | 12.79:1 |
Values
| HEX | #1A315D |
| RGB | rgb(26, 49, 93) |
| HSL | hsl(219, 56%, 23%) |
| OKLCH | oklch(32% 0.084 262) |
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 #1A315D | 12.79:1 | AAA | Lc -102.0 | Preferred for body text |
| Black text on #1A315D | 1.64:1 | Fails | Lc 0.0 | Not readable |
| #1A315D text on white | 12.79:1 | AAA | Lc 98.7 | Preferred for body text |
| #1A315D text on black | 1.64:1 | Fails | Lc 0.0 | Not readable |
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 950.
-
Step 50
50
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFE
oklch(93.6% 0.029 264.4)
-
Step 200
200
#C6DAFE
oklch(88.5% 0.054 262.2)
-
Step 300
300
#9FC1FF
oklch(80.9% 0.096 262.2)
-
Step 400
400
#6B9EFF
oklch(70.7% 0.153 262.2)
-
Step 500
500
#4282FF
oklch(63.2% 0.198 262)
-
Step 600
600
#2066F1
oklch(55.6% 0.22 262.1)
-
Step 700
700
#1354D2
oklch(49.2% 0.204 262)
-
Step 800
800
#1345AA
oklch(42.7% 0.17 262.2)
-
Step 900
900
#163C86
oklch(37.7% 0.132 261.9)
-
Step 950
950 (this color)
#1A315D
oklch(32% 0.084 262)
#1A315D 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) | #1C355F | 0.013 |
| Deuteranopia (no green cones) | #102F5C | 0.013 |
| Tritanopia (no blue cones) | #003B42 | 0.068 |
| Achromatopsia (no color) | #323232 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1A315D
#1A315D
oklch(32% 0.084 262)
- #432F00
#432F00
oklch(32% 0.066 82.9)
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 #1A315D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.019
- Marine #042E60 ΔE 0.022
- Marine Blue #01386A ΔE 0.031
- Dark Blue Grey #1F3B4D ΔE 0.049
- Midnight Green #073B4C ΔE 0.051
- Space Cadet #2B2D42 ΔE 0.051
- Gunmetal #293241 ΔE 0.054
- Oxford Blue #1B263B ΔE 0.066
Use #1A315D 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.