#1A173D
Closest named color: Rich Black (#0D1B2A). oklch(23.3% 0.07 283), rgb(26, 23, 61).
Aa
White text reads best on this color (17.01:1).
About this color
#1A173D is a very dark, moderately saturated purple. In OKLCH its lightness is 23%, its chroma 0.070 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.047 away. White text reads best on it, at 17.01:1.
| Hue family | Purples |
| Lightness | very dark (23%) |
| Chroma | moderately saturated (0.070) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.23:1 |
| White text | 17.01:1 |
Values
| HEX | #1A173D |
| RGB | rgb(26, 23, 61) |
| HSL | hsl(245, 45%, 16%) |
| OKLCH | oklch(23.3% 0.07 283) |
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 #1A173D | 17.01:1 | AAA | Lc -106.2 | Preferred for body text |
| Black text on #1A173D | 1.23:1 | Fails | Lc 0.0 | Not readable |
| #1A173D text on white | 17.01:1 | AAA | Lc 103.8 | Preferred for body text |
| #1A173D text on black | 1.23:1 | 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
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E7E8FA
oklch(93.6% 0.024 283.4)
-
Step 200
200
#D4D6F8
oklch(88.5% 0.047 282.7)
-
Step 300
300
#B8BAF6
oklch(80.8% 0.084 282.8)
-
Step 400
400
#9694F1
oklch(70.7% 0.134 283.4)
-
Step 500
500
#7E77EC
oklch(63.2% 0.171 283.1)
-
Step 600
600
#695CDA
oklch(55.6% 0.186 283.2)
-
Step 700
700
#584BBD
oklch(49.1% 0.172 283.2)
-
Step 800
800
#473E99
oklch(42.6% 0.143 282.9)
-
Step 900
900
#3B367A
oklch(37.7% 0.112 282.9)
-
Step 950
950 (this color)
#1A173D
oklch(23.3% 0.07 283)
#1A173D 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) | #031D3E | 0.034 |
| Deuteranopia (no green cones) | #021B3C | 0.034 |
| Tritanopia (no blue cones) | #0D1F27 | 0.059 |
| Achromatopsia (no color) | #1C1C1C | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1A173D
#1A173D
oklch(23.3% 0.07 283)
- #221E00
#221E00
oklch(23.2% 0.049 102.4)
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 #1A173D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.047
- Navy Blue #001146 ΔE 0.049
- Oxford Blue #1B263B ΔE 0.050
- Dark Indigo #1F0954 ΔE 0.052
- Dark #1B2431 ΔE 0.053
- Midnight Purple #280137 ΔE 0.059
- Very Dark Purple #2A0134 ΔE 0.063
- Dark Purple #35063E ΔE 0.066
Use #1A173D 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.