#1D315D
Closest named color: Prussian Blue (#1D3557). oklch(32.2% 0.083 264), rgb(29, 49, 93).
Aa
White text reads best on this color (12.73:1).
About this color
#1D315D is a dark, moderately saturated blue. In OKLCH its lightness is 32%, its chroma 0.083 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.018 away. White text reads best on it, at 12.73:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.64:1 |
| White text | 12.73:1 |
Values
| HEX | #1D315D |
| RGB | rgb(29, 49, 93) |
| HSL | hsl(221, 52%, 24%) |
| OKLCH | oklch(32.2% 0.083 264) |
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 #1D315D | 12.73:1 | AAA | Lc -102.0 | Preferred for body text |
| Black text on #1D315D | 1.64:1 | Fails | Lc 0.0 | Not readable |
| #1D315D text on white | 12.73:1 | AAA | Lc 98.6 | Preferred for body text |
| #1D315D 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
#E0EAFD
oklch(93.5% 0.028 263.4)
-
Step 200
200
#C7DAFE
oklch(88.6% 0.054 263.2)
-
Step 300
300
#A1C0FF
oklch(80.8% 0.096 264.1)
-
Step 400
400
#6F9DFF
oklch(70.7% 0.152 263.9)
-
Step 500
500
#4980FF
oklch(63% 0.198 264)
-
Step 600
600
#2D65F0
oklch(55.6% 0.217 263.9)
-
Step 700
700
#2153D1
oklch(49.2% 0.202 263.9)
-
Step 800
800
#1C45A9
oklch(42.8% 0.167 263.8)
-
Step 900
900
#1C3B85
oklch(37.6% 0.13 264)
-
Step 950
950 (this color)
#1D315D
oklch(32.2% 0.083 264)
#1D315D 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) | #1C365F | 0.015 |
| Deuteranopia (no green cones) | #12305C | 0.013 |
| Tritanopia (no blue cones) | #003B42 | 0.069 |
| Achromatopsia (no color) | #323232 | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D315D
#1D315D
oklch(32.2% 0.083 264)
- #433000
#433000
oklch(32.2% 0.066 84.5)
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 #1D315D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.018
- Marine #042E60 ΔE 0.026
- Marine Blue #01386A ΔE 0.032
- Dark Blue Grey #1F3B4D ΔE 0.048
- Space Cadet #2B2D42 ΔE 0.050
- Midnight Green #073B4C ΔE 0.052
- Gunmetal #293241 ΔE 0.053
- Oxford Blue #1B263B ΔE 0.066
Use #1D315D 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.