#17193C
Closest named color: Rich Black (#0D1B2A). oklch(23.4% 0.066 277.5), rgb(23, 25, 60).
Aa
White text reads best on this color (16.92:1).
About this color
#17193C is a very dark, muted blue. In OKLCH its lightness is 23%, its chroma 0.066 and its hue 278°. 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 16.92:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | muted (0.066) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.24:1 |
| White text | 16.92:1 |
Values
| HEX | #17193C |
| RGB | rgb(23, 25, 60) |
| HSL | hsl(237, 45%, 16%) |
| OKLCH | oklch(23.4% 0.066 277.5) |
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 #17193C | 16.92:1 | AAA | Lc -106.1 | Preferred for body text |
| Black text on #17193C | 1.24:1 | Fails | Lc 0.0 | Not readable |
| #17193C text on white | 16.92:1 | AAA | Lc 103.7 | Preferred for body text |
| #17193C 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E6E9F9
oklch(93.6% 0.022 277.5)
-
Step 200
200
#D2D7F6
oklch(88.5% 0.043 278.2)
-
Step 300
300
#B4BCF3
oklch(80.8% 0.078 278.1)
-
Step 400
400
#8E98EE
oklch(70.7% 0.126 277.6)
-
Step 500
500
#747CE8
oklch(63.1% 0.16 277.6)
-
Step 600
600
#5E62D6
oklch(55.5% 0.174 277.6)
-
Step 700
700
#4E51B9
oklch(49.1% 0.161 277.5)
-
Step 800
800
#404396
oklch(42.8% 0.133 277.6)
-
Step 900
900
#363977
oklch(37.6% 0.104 278.1)
-
Step 950
950 (this color)
#17193C
oklch(23.4% 0.066 277.5)
#17193C 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) | #081E3D | 0.023 |
| Deuteranopia (no green cones) | #041B3B | 0.025 |
| Tritanopia (no blue cones) | #062127 | 0.059 |
| Achromatopsia (no color) | #1D1D1D | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17193C
#17193C
oklch(23.4% 0.066 277.5)
- #241E00
#241E00
oklch(23.5% 0.049 98.6)
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 #17193C, 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 0.045
- Dark #1B2431 ΔE 0.048
- Navy Blue #001146 ΔE 0.048
- Dark Indigo #1F0954 ΔE 0.057
- Jet #212529 ΔE 0.065
- Midnight Purple #280137 ΔE 0.067
- Very Dark Purple #2A0134 ΔE 0.070
Use #17193C 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.