#1D1D45
Closest named color: Oxford Blue (#1B263B). oklch(25.6% 0.073 279.9), rgb(29, 29, 69).
Aa
White text reads best on this color (15.98:1).
About this color
#1D1D45 is a dark, moderately saturated blue. In OKLCH its lightness is 26%, its chroma 0.073 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.038 away. White text reads best on it, at 15.98:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.31:1 |
| White text | 15.98:1 |
Values
| HEX | #1D1D45 |
| RGB | rgb(29, 29, 69) |
| HSL | hsl(240, 41%, 19%) |
| OKLCH | oklch(25.6% 0.073 279.9) |
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 #1D1D45 | 15.98:1 | AAA | Lc -105.4 | Preferred for body text |
| Black text on #1D1D45 | 1.31:1 | Fails | Lc 0.0 | Not readable |
| #1D1D45 text on white | 15.98:1 | AAA | Lc 102.8 | Preferred for body text |
| #1D1D45 text on black | 1.31:1 | 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
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E6E8FB
oklch(93.5% 0.026 281.1)
-
Step 200
200
#D2D6F9
oklch(88.4% 0.048 280.2)
-
Step 300
300
#B5BBF8
oklch(80.9% 0.086 279.9)
-
Step 400
400
#9095F5
oklch(70.6% 0.139 279.9)
-
Step 500
500
#7778F1
oklch(63.1% 0.177 279.7)
-
Step 600
600
#625DDF
oklch(55.6% 0.192 279.8)
-
Step 700
700
#524BC2
oklch(49% 0.18 280.1)
-
Step 800
800
#433F9D
oklch(42.8% 0.148 280)
-
Step 900
900
#38377D
oklch(37.8% 0.115 280)
-
Step 950
950 (this color)
#1D1D45
oklch(25.6% 0.073 279.9)
#1D1D45 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) | #092346 | 0.029 |
| Deuteranopia (no green cones) | #052044 | 0.031 |
| Tritanopia (no blue cones) | #0C262D | 0.065 |
| Achromatopsia (no color) | #222222 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D1D45
#1D1D45
oklch(25.6% 0.073 279.9)
- #292300
#292300
oklch(25.5% 0.053 99.7)
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 #1D1D45, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.038
- Dark #1B2431 ΔE 0.049
- Dark Indigo #1F0954 ΔE 0.052
- Rich Black #0D1B2A ΔE 0.059
- Navy Blue #001146 ΔE 0.060
- Space Cadet #2B2D42 ΔE 0.061
- Jet #212529 ΔE 0.066
- Marine #042E60 ΔE 0.067
Use #1D1D45 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.