#12184E
Closest named color: Dark Indigo (#1F0954). oklch(24.4% 0.098 272), rgb(18, 24, 78).
Aa
White text reads best on this color (16.58:1).
About this color
#12184E is a very dark, moderately saturated blue. In OKLCH its lightness is 24%, its chroma 0.098 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.036 away. White text reads best on it, at 16.58:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.26:1 |
| White text | 16.58:1 |
Values
| HEX | #12184E |
| RGB | rgb(18, 24, 78) |
| HSL | hsl(234, 63%, 19%) |
| OKLCH | oklch(24.4% 0.098 272) |
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 #12184E | 16.58:1 | AAA | Lc -105.7 | Preferred for body text |
| Black text on #12184E | 1.26:1 | Fails | Lc 0.0 | Not readable |
| #12184E text on white | 16.58:1 | AAA | Lc 103.2 | Preferred for body text |
| #12184E text on black | 1.26:1 | 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
#E2E9FF
oklch(93.5% 0.031 271.7)
-
Step 200
200
#CCD8FF
oklch(88.6% 0.055 271.8)
-
Step 300
300
#ABBDFF
oklch(80.9% 0.096 272.3)
-
Step 400
400
#8098FF
oklch(70.7% 0.153 272.1)
-
Step 500
500
#627AFF
oklch(63.1% 0.198 271.8)
-
Step 600
600
#4957FF
oklch(55.6% 0.245 271.8)
-
Step 700
700
#3B40E5
oklch(49% 0.241 271.9)
-
Step 800
800
#3037B9
oklch(42.7% 0.199 271.9)
-
Step 900
900
#293392
oklch(37.8% 0.155 272)
-
Step 950
950 (this color)
#12184E
oklch(24.4% 0.098 272)
#12184E 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) | #002150 | 0.028 |
| Deuteranopia (no green cones) | #001C4D | 0.021 |
| Tritanopia (no blue cones) | #002630 | 0.079 |
| Achromatopsia (no color) | #1E1E1E | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #12184E
#12184E
oklch(24.4% 0.098 272)
- #291F00
#291F00
oklch(24.4% 0.05 91.4)
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 #12184E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.036
- Navy Blue #001146 ΔE 0.038
- Darkblue #030764 ΔE 0.054
- Night Blue #040348 ΔE 0.058
- Oxford Blue #1B263B ΔE 0.062
- Midnight Blue #191970 ΔE 0.063
- Marine #042E60 ΔE 0.068
- Dark Royal Blue #02066F ΔE 0.068
Use #12184E 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.