#1B113A
Closest named color: Midnight Purple (#280137). oklch(21.8% 0.076 289.9), rgb(27, 17, 58).
Aa
White text reads best on this color (17.67:1).
About this color
#1B113A is a very dark, moderately saturated purple. In OKLCH its lightness is 22%, its chroma 0.076 and its hue 290°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Purple (#280137), ΔE 0.045 away. White text reads best on it, at 17.67:1.
| Hue family | Purples |
| Lightness | very dark (22%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Midnight Purple (#280137) |
| Black text | 1.18:1 |
| White text | 17.67:1 |
Values
| HEX | #1B113A |
| RGB | rgb(27, 17, 58) |
| HSL | hsl(255, 55%, 15%) |
| OKLCH | oklch(21.8% 0.076 289.9) |
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 #1B113A | 17.67:1 | AAA | Lc -106.6 | Preferred for body text |
| Black text on #1B113A | 1.18:1 | Fails | Lc 0.0 | Not readable |
| #1B113A text on white | 17.67:1 | AAA | Lc 104.3 | Preferred for body text |
| #1B113A text on black | 1.18:1 | 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
#F5F4FD
oklch(97% 0.012 291.3)
-
Step 100
100
#E9E7FB
oklch(93.5% 0.027 290.5)
-
Step 200
200
#D8D4F9
oklch(88.5% 0.051 290.3)
-
Step 300
300
#BFB7F7
oklch(80.8% 0.09 290)
-
Step 400
400
#A08FF3
oklch(70.6% 0.144 290)
-
Step 500
500
#8B70EE
oklch(63.1% 0.182 290)
-
Step 600
600
#7654DD
oklch(55.6% 0.199 289.8)
-
Step 700
700
#6443C0
oklch(49.1% 0.186 290)
-
Step 800
800
#51389B
oklch(42.6% 0.154 289.9)
-
Step 900
900
#43327B
oklch(37.7% 0.119 290.2)
-
Step 950
950 (this color)
#1B113A
oklch(21.8% 0.076 289.9)
#1B113A 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) | #00193B | 0.044 |
| Deuteranopia (no green cones) | #001739 | 0.044 |
| Tritanopia (no blue cones) | #111A23 | 0.061 |
| Achromatopsia (no color) | #181818 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B113A
#1B113A
oklch(21.8% 0.076 289.9)
- #1C1C00
#1C1C00
oklch(21.9% 0.048 109.8)
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 #1B113A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Purple #280137 ΔE 0.045
- Very Dark Purple #2A0134 ΔE 0.050
- Navy Blue #001146 ΔE 0.050
- Dark Indigo #1F0954 ΔE 0.051
- Rich Black #0D1B2A ΔE 0.053
- Dark Purple #35063E ΔE 0.061
- Night Blue #040348 ΔE 0.064
- Oxford Blue #1B263B ΔE 0.066
Use #1B113A 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.