#13174C
Closest named color: Dark Indigo (#1F0954). oklch(24.1% 0.096 273.3), rgb(19, 23, 76).
Aa
White text reads best on this color (16.73:1).
About this color
#13174C is a very dark, moderately saturated blue. In OKLCH its lightness is 24%, its chroma 0.096 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.035 away. White text reads best on it, at 16.73:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.25:1 |
| White text | 16.73:1 |
Values
| HEX | #13174C |
| RGB | rgb(19, 23, 76) |
| HSL | hsl(236, 60%, 19%) |
| OKLCH | oklch(24.1% 0.096 273.3) |
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 #13174C | 16.73:1 | AAA | Lc -105.8 | Preferred for body text |
| Black text on #13174C | 1.25:1 | Fails | Lc 0.0 | Not readable |
| #13174C text on white | 16.73:1 | AAA | Lc 103.4 | Preferred for body text |
| #13174C 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E3E9FF
oklch(93.6% 0.03 273.6)
-
Step 200
200
#CDD7FF
oklch(88.4% 0.056 274.2)
-
Step 300
300
#ACBDFF
oklch(80.9% 0.095 273)
-
Step 400
400
#8397FF
oklch(70.7% 0.153 273.6)
-
Step 500
500
#6679FF
oklch(63.1% 0.198 273.3)
-
Step 600
600
#4E55FF
oklch(55.6% 0.246 273.3)
-
Step 700
700
#4041E2
oklch(49.1% 0.235 273.3)
-
Step 800
800
#3437B7
oklch(42.7% 0.196 273.4)
-
Step 900
900
#2C3290
oklch(37.6% 0.152 273.6)
-
Step 950
950 (this color)
#13174C
oklch(24.1% 0.096 273.3)
#13174C 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) | #00204E | 0.029 |
| Deuteranopia (no green cones) | #001B4B | 0.023 |
| Tritanopia (no blue cones) | #00252F | 0.078 |
| Achromatopsia (no color) | #1E1E1E | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #13174C
#13174C
oklch(24.1% 0.096 273.3)
- #271F00
#271F00
oklch(24.2% 0.05 95.1)
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 #13174C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.035
- Navy Blue #001146 ΔE 0.036
- Night Blue #040348 ΔE 0.056
- Darkblue #030764 ΔE 0.057
- Oxford Blue #1B263B ΔE 0.062
- Midnight Blue #191970 ΔE 0.067
- Rich Black #0D1B2A ΔE 0.069
- Dark Royal Blue #02066F ΔE 0.072
Use #13174C 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.