#1D185D
Closest named color: Dark Indigo (#1F0954). oklch(26.8% 0.118 278.2), rgb(29, 24, 93).
Aa
White text reads best on this color (15.66:1).
About this color
#1D185D is a dark, moderately saturated blue. In OKLCH its lightness is 27%, its chroma 0.118 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.034 away. White text reads best on it, at 15.66:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.34:1 |
| White text | 15.66:1 |
Values
| HEX | #1D185D |
| RGB | rgb(29, 24, 93) |
| HSL | hsl(244, 59%, 23%) |
| OKLCH | oklch(26.8% 0.118 278.2) |
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 #1D185D | 15.66:1 | AAA | Lc -104.9 | Preferred for body text |
| Black text on #1D185D | 1.34:1 | Fails | Lc 0.0 | Not readable |
| #1D185D text on white | 15.66:1 | AAA | Lc 102.2 | Preferred for body text |
| #1D185D text on black | 1.34:1 | 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
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E5E8FF
oklch(93.6% 0.031 279.9)
-
Step 200
200
#D0D6FF
oklch(88.5% 0.057 278.6)
-
Step 300
300
#B2BBFF
oklch(81% 0.097 278.2)
-
Step 400
400
#8C94FF
oklch(70.7% 0.155 278.4)
-
Step 500
500
#7275FF
oklch(63.2% 0.2 278.1)
-
Step 600
600
#5D4FFF
oklch(55.7% 0.249 278.1)
-
Step 700
700
#501AFC
oklch(49.1% 0.287 278.3)
-
Step 800
800
#401ECC
oklch(42.7% 0.239 278.1)
-
Step 900
900
#3425A0
oklch(37.7% 0.186 278.2)
-
Step 950
950 (this color)
#1D185D
oklch(26.8% 0.118 278.2)
#1D185D 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) | #00265F | 0.042 |
| Deuteranopia (no green cones) | #00205C | 0.035 |
| Tritanopia (no blue cones) | #002B38 | 0.097 |
| Achromatopsia (no color) | #232323 | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D185D
#1D185D
oklch(26.8% 0.118 278.2)
- #2D2600
#2D2600
oklch(26.8% 0.056 98.7)
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 #1D185D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.034
- Midnight Blue #191970 ΔE 0.035
- Darkblue #030764 ΔE 0.054
- Dark Royal Blue #02066F ΔE 0.059
- Marine #042E60 ΔE 0.059
- Deep Blue #040273 ΔE 0.063
- Navy Blue #001146 ΔE 0.067
- Oxford Blue #1B263B ΔE 0.078
Use #1D185D 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.