#191739
Closest named color: Rich Black (#0D1B2A). oklch(22.8% 0.064 282.7), rgb(25, 23, 57).
Aa
White text reads best on this color (17.17:1).
About this color
#191739 is a very dark, muted purple. In OKLCH its lightness is 23%, its chroma 0.064 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.040 away. White text reads best on it, at 17.17:1.
| 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 | 17.17:1 |
Values
| HEX | #191739 |
| RGB | rgb(25, 23, 57) |
| HSL | hsl(244, 43%, 16%) |
| OKLCH | oklch(22.8% 0.064 282.7) |
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 #191739 | 17.17:1 | AAA | Lc -106.3 | Preferred for body text |
| Black text on #191739 | 1.22:1 | Fails | Lc 0.0 | Not readable |
| #191739 text on white | 17.17:1 | AAA | Lc 103.9 | Preferred for body text |
| #191739 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
#E7E8F9
oklch(93.5% 0.023 283.3)
-
Step 200
200
#D4D6F5
oklch(88.4% 0.043 282.6)
-
Step 300
300
#B9BBF1
oklch(80.9% 0.076 282.9)
-
Step 400
400
#9696EA
oklch(70.7% 0.122 282.8)
-
Step 500
500
#7E7AE3
oklch(63.2% 0.154 282.8)
-
Step 600
600
#6860D1
oklch(55.5% 0.169 282.6)
-
Step 700
700
#574FB5
oklch(49.1% 0.156 282.5)
-
Step 800
800
#474192
oklch(42.6% 0.129 282.8)
-
Step 900
900
#3B3875
oklch(37.7% 0.101 282.6)
-
Step 950
950 (this color)
#191739
oklch(22.8% 0.064 282.7)
#191739 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) | #071C3A | 0.028 |
| Deuteranopia (no green cones) | #051A38 | 0.029 |
| Tritanopia (no blue cones) | #0E1E25 | 0.054 |
| Achromatopsia (no color) | #1B1B1B | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #191739
#191739
oklch(22.8% 0.064 282.7)
- #211D00
#211D00
oklch(22.8% 0.048 102.2)
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 #191739, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.040
- Oxford Blue #1B263B ΔE 0.050
- Dark #1B2431 ΔE 0.050
- Navy Blue #001146 ΔE 0.051
- Dark Indigo #1F0954 ΔE 0.059
- Midnight Purple #280137 ΔE 0.060
- Very Dark Purple #2A0134 ΔE 0.063
- Jet #212529 ΔE 0.066
Use #191739 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.