#1D1B4F
Closest named color: Dark Indigo (#1F0954). oklch(26% 0.093 279.5), rgb(29, 27, 79).
Aa
White text reads best on this color (15.88:1).
About this color
#1D1B4F is a dark, moderately saturated blue. In OKLCH its lightness is 26%, its chroma 0.093 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.038 away. White text reads best on it, at 15.88:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.32:1 |
| White text | 15.88:1 |
Values
| HEX | #1D1B4F |
| RGB | rgb(29, 27, 79) |
| HSL | hsl(242, 49%, 21%) |
| OKLCH | oklch(26% 0.093 279.5) |
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 #1D1B4F | 15.88:1 | AAA | Lc -105.2 | Preferred for body text |
| Black text on #1D1B4F | 1.32:1 | Fails | Lc 0.0 | Not readable |
| #1D1B4F text on white | 15.88:1 | AAA | Lc 102.6 | Preferred for body text |
| #1D1B4F text on black | 1.32:1 | 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
#E5E8FF
oklch(93.6% 0.031 279.9)
-
Step 200
200
#D1D6FF
oklch(88.5% 0.057 279.7)
-
Step 300
300
#B3BAFF
oklch(80.8% 0.098 279.5)
-
Step 400
400
#8E93FF
oklch(70.6% 0.156 279.6)
-
Step 500
500
#7573FF
oklch(63% 0.202 279.5)
-
Step 600
600
#614FFB
oklch(55.6% 0.243 279.7)
-
Step 700
700
#513EDB
oklch(49.1% 0.226 279.5)
-
Step 800
800
#4235B1
oklch(42.8% 0.187 279.7)
-
Step 900
900
#36318C
oklch(37.8% 0.146 279.3)
-
Step 950
950 (this color)
#1D1B4F
oklch(26% 0.093 279.5)
#1D1B4F 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) | #002451 | 0.038 |
| Deuteranopia (no green cones) | #00204E | 0.036 |
| Tritanopia (no blue cones) | #022832 | 0.080 |
| Achromatopsia (no color) | #222222 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D1B4F
#1D1B4F
oklch(26% 0.093 279.5)
- #2A2400
#2A2400
oklch(25.9% 0.054 99.9)
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 #1D1B4F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.038
- Oxford Blue #1B263B ΔE 0.054
- Navy Blue #001146 ΔE 0.058
- Midnight Blue #191970 ΔE 0.060
- Marine #042E60 ΔE 0.061
- Dark #1B2431 ΔE 0.068
- Darkblue #030764 ΔE 0.069
- Space Cadet #2B2D42 ΔE 0.071
Use #1D1B4F 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.