#1C183A
Closest named color: Rich Black (#0D1B2A). oklch(23.4% 0.063 285.8), rgb(28, 24, 58).
Aa
White text reads best on this color (16.92:1).
About this color
#1C183A is a very dark, muted purple. In OKLCH its lightness is 23%, its chroma 0.063 and its hue 286°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.043 away. White text reads best on it, at 16.92:1.
| Hue family | Purples |
| Lightness | very dark (23%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.24:1 |
| White text | 16.92:1 |
Values
| HEX | #1C183A |
| RGB | rgb(28, 24, 58) |
| HSL | hsl(247, 41%, 16%) |
| OKLCH | oklch(23.4% 0.063 285.8) |
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 #1C183A | 16.92:1 | AAA | Lc -106.1 | Preferred for body text |
| Black text on #1C183A | 1.24:1 | Fails | Lc 0.0 | Not readable |
| #1C183A text on white | 16.92:1 | AAA | Lc 103.7 | Preferred for body text |
| #1C183A text on black | 1.24:1 | 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
#F5F5FC
oklch(97.2% 0.009 286.2)
-
Step 100
100
#E8E8F8
oklch(93.6% 0.022 286)
-
Step 200
200
#D6D6F4
oklch(88.5% 0.041 285.5)
-
Step 300
300
#BCBAF0
oklch(80.9% 0.076 286.3)
-
Step 400
400
#9A95E8
oklch(70.7% 0.12 285.7)
-
Step 500
500
#8378E1
oklch(63.1% 0.154 285.9)
-
Step 600
600
#6E5FCF
oklch(55.7% 0.167 285.8)
-
Step 700
700
#5C4DB3
oklch(49% 0.156 285.9)
-
Step 800
800
#4B4091
oklch(42.7% 0.129 285.8)
-
Step 900
900
#3E3774
oklch(37.7% 0.101 285.7)
-
Step 950
950 (this color)
#1C183A
oklch(23.4% 0.063 285.8)
#1C183A 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) | #091E3B | 0.031 |
| Deuteranopia (no green cones) | #081C39 | 0.031 |
| Tritanopia (no blue cones) | #131F26 | 0.053 |
| Achromatopsia (no color) | #1D1D1D | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C183A
#1C183A
oklch(23.4% 0.063 285.8)
- #211F00
#211F00
oklch(23.4% 0.05 106.2)
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 #1C183A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.043
- Oxford Blue #1B263B ΔE 0.046
- Dark #1B2431 ΔE 0.047
- Navy Blue #001146 ΔE 0.056
- Dark Indigo #1F0954 ΔE 0.058
- Midnight Purple #280137 ΔE 0.060
- Very Dark Purple #2A0134 ΔE 0.062
- Jet #212529 ΔE 0.063
Use #1C183A 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.