#1A1739
Closest named color: Rich Black (#0D1B2A). oklch(22.9% 0.064 284.2), rgb(26, 23, 57).
Aa
White text reads best on this color (17.13:1).
About this color
#1A1739 is a very dark, muted purple. In OKLCH its lightness is 23%, its chroma 0.064 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.041 away. White text reads best on it, at 17.13:1.
| Hue family | Purples |
| Lightness | very dark (23%) |
| Chroma | muted (0.064) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.22:1 |
| White text | 17.13:1 |
Values
| HEX | #1A1739 |
| RGB | rgb(26, 23, 57) |
| HSL | hsl(245, 43%, 16%) |
| OKLCH | oklch(22.9% 0.064 284.2) |
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 #1A1739 | 17.13:1 | AAA | Lc -106.3 | Preferred for body text |
| Black text on #1A1739 | 1.22:1 | Fails | Lc 0.0 | Not readable |
| #1A1739 text on white | 17.13:1 | AAA | Lc 103.9 | Preferred for body text |
| #1A1739 text on black | 1.22:1 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E8E8F8
oklch(93.6% 0.022 286)
-
Step 200
200
#D5D6F5
oklch(88.5% 0.042 284)
-
Step 300
300
#BABBF0
oklch(81% 0.074 283.8)
-
Step 400
400
#9895E9
oklch(70.6% 0.121 284.5)
-
Step 500
500
#8079E2
oklch(63.1% 0.154 284.1)
-
Step 600
600
#6B5FD0
oklch(55.5% 0.168 284.3)
-
Step 700
700
#5A4EB4
oklch(49.1% 0.156 284.4)
-
Step 800
800
#494192
oklch(42.8% 0.129 284)
-
Step 900
900
#3D3874
oklch(37.8% 0.1 284.3)
-
Step 950
950 (this color)
#1A1739
oklch(22.9% 0.064 284.2)
#1A1739 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) | #071D3A | 0.030 |
| Deuteranopia (no green cones) | #061A38 | 0.030 |
| Tritanopia (no blue cones) | #101E25 | 0.053 |
| Achromatopsia (no color) | #1B1B1B | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1A1739
#1A1739
oklch(22.9% 0.064 284.2)
- #211E00
#211E00
oklch(23.1% 0.049 104.3)
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 #1A1739, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.041
- Oxford Blue #1B263B ΔE 0.049
- Dark #1B2431 ΔE 0.050
- Navy Blue #001146 ΔE 0.052
- Dark Indigo #1F0954 ΔE 0.059
- Midnight Purple #280137 ΔE 0.059
- Very Dark Purple #2A0134 ΔE 0.062
- Jet #212529 ΔE 0.065
Use #1A1739 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.