#1D1D4C
Closest named color: Dark Indigo (#1F0954). oklch(26.2% 0.085 278.8), rgb(29, 29, 76).
Aa
White text reads best on this color (15.76:1).
About this color
#1D1D4C is a dark, moderately saturated blue. In OKLCH its lightness is 26%, its chroma 0.085 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.045 away. White text reads best on it, at 15.76:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.33:1 |
| White text | 15.76:1 |
Values
| HEX | #1D1D4C |
| RGB | rgb(29, 29, 76) |
| HSL | hsl(240, 45%, 21%) |
| OKLCH | oklch(26.2% 0.085 278.8) |
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 #1D1D4C | 15.76:1 | AAA | Lc -105.2 | Preferred for body text |
| Black text on #1D1D4C | 1.33:1 | Fails | Lc 0.0 | Not readable |
| #1D1D4C text on white | 15.76:1 | AAA | Lc 102.5 | Preferred for body text |
| #1D1D4C text on black | 1.33:1 | 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
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E5E8FE
oklch(93.5% 0.03 279.6)
-
Step 200
200
#D0D6FE
oklch(88.4% 0.055 278.5)
-
Step 300
300
#B2BAFF
oklch(80.8% 0.098 278.8)
-
Step 400
400
#8D94FF
oklch(70.8% 0.155 278.8)
-
Step 500
500
#7374FF
oklch(63.1% 0.202 278.6)
-
Step 600
600
#5F56F0
oklch(55.5% 0.223 278.9)
-
Step 700
700
#4F45D1
oklch(49.1% 0.207 278.8)
-
Step 800
800
#403AA9
oklch(42.7% 0.171 278.7)
-
Step 900
900
#353486
oklch(37.7% 0.134 278.4)
-
Step 950
950 (this color)
#1D1D4C
oklch(26.2% 0.085 278.8)
#1D1D4C 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) | #00254E | 0.037 |
| Deuteranopia (no green cones) | #00214B | 0.035 |
| Tritanopia (no blue cones) | #052831 | 0.073 |
| Achromatopsia (no color) | #232323 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D1D4C
#1D1D4C
oklch(26.2% 0.085 278.8)
- #2B2400
#2B2400
oklch(26% 0.054 98.3)
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 #1D1D4C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.045
- Oxford Blue #1B263B ΔE 0.046
- Marine #042E60 ΔE 0.060
- Dark #1B2431 ΔE 0.060
- Navy Blue #001146 ΔE 0.060
- Space Cadet #2B2D42 ΔE 0.064
- Midnight Blue #191970 ΔE 0.066
- Rich Black #0D1B2A ΔE 0.071
Use #1D1D4C 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.