#1B193C
Closest named color: Oxford Blue (#1B263B). oklch(23.7% 0.065 282.8), rgb(27, 25, 60).
Aa
White text reads best on this color (16.78:1).
About this color
#1B193C is a very dark, muted purple. In OKLCH its lightness is 24%, its chroma 0.065 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.043 away. White text reads best on it, at 16.78:1.
| Hue family | Purples |
| Lightness | very dark (24%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.25:1 |
| White text | 16.78:1 |
Values
| HEX | #1B193C |
| RGB | rgb(27, 25, 60) |
| HSL | hsl(243, 41%, 17%) |
| OKLCH | oklch(23.7% 0.065 282.8) |
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 #1B193C | 16.78:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #1B193C | 1.25:1 | Fails | Lc 0.0 | Not readable |
| #1B193C text on white | 16.78:1 | AAA | Lc 103.6 | Preferred for body text |
| #1B193C text on black | 1.25:1 | 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
#B9BBF2
oklch(81% 0.077 282.9)
-
Step 400
400
#9696EB
oklch(70.8% 0.123 282.8)
-
Step 500
500
#7E79E5
oklch(63.1% 0.158 283)
-
Step 600
600
#6960D3
oklch(55.7% 0.171 282.9)
-
Step 700
700
#574EB7
oklch(49.1% 0.16 282.6)
-
Step 800
800
#474194
oklch(42.8% 0.132 282.5)
-
Step 900
900
#3B3876
oklch(37.8% 0.103 282.5)
-
Step 950
950 (this color)
#1B193C
oklch(23.7% 0.065 282.8)
#1B193C 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) | #091F3D | 0.029 |
| Deuteranopia (no green cones) | #071C3B | 0.029 |
| Tritanopia (no blue cones) | #0F2127 | 0.057 |
| Achromatopsia (no color) | #1D1D1D | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B193C
#1B193C
oklch(23.7% 0.065 282.8)
- #231F00
#231F00
oklch(23.6% 0.05 102.5)
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 #1B193C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.043
- Rich Black #0D1B2A ΔE 0.044
- Dark #1B2431 ΔE 0.047
- Navy Blue #001146 ΔE 0.054
- Dark Indigo #1F0954 ΔE 0.057
- Jet #212529 ΔE 0.063
- Midnight Purple #280137 ΔE 0.063
- Very Dark Purple #2A0134 ΔE 0.066
Use #1B193C 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.