#12183D
Closest named color: Navy Blue (#001146). oklch(22.8% 0.071 272.6), rgb(18, 24, 61).
Aa
White text reads best on this color (17.16:1).
About this color
#12183D is a very dark, moderately saturated blue. In OKLCH its lightness is 23%, its chroma 0.071 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Navy Blue (#001146), ΔE 0.039 away. White text reads best on it, at 17.16:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.22:1 |
| White text | 17.16:1 |
Values
| HEX | #12183D |
| RGB | rgb(18, 24, 61) |
| HSL | hsl(232, 54%, 15%) |
| OKLCH | oklch(22.8% 0.071 272.6) |
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 #12183D | 17.16:1 | AAA | Lc -106.3 | Preferred for body text |
| Black text on #12183D | 1.22:1 | Fails | Lc 0.0 | Not readable |
| #12183D text on white | 17.16:1 | AAA | Lc 103.9 | Preferred for body text |
| #12183D text on black | 1.22:1 | 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
#E4E9FB
oklch(93.6% 0.025 273.5)
-
Step 200
200
#CED8F9
oklch(88.5% 0.047 272.1)
-
Step 300
300
#AEBEF8
oklch(81% 0.084 272.5)
-
Step 400
400
#859AF4
oklch(70.8% 0.134 272.6)
-
Step 500
500
#687EF0
oklch(63.2% 0.171 272.4)
-
Step 600
600
#5264DE
oklch(55.7% 0.186 272.6)
-
Step 700
700
#4352C1
oklch(49.2% 0.173 272.5)
-
Step 800
800
#37449C
oklch(42.8% 0.143 272.5)
-
Step 900
900
#2F3A7C
oklch(37.7% 0.112 272.8)
-
Step 950
950 (this color)
#12183D
oklch(22.8% 0.071 272.6)
#12183D 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 | 0.022 |
| Deuteranopia (no green cones) | #001A3C | 0.023 |
| Tritanopia (no blue cones) | #002127 | 0.062 |
| Achromatopsia (no color) | #1B1B1B | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #12183D
#12183D
oklch(22.8% 0.071 272.6)
- #241B00
#241B00
oklch(22.7% 0.046 91.6)
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 #12183D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.039
- Rich Black #0D1B2A ΔE 0.041
- Oxford Blue #1B263B ΔE 0.051
- Dark #1B2431 ΔE 0.054
- Dark Indigo #1F0954 ΔE 0.056
- Night Blue #040348 ΔE 0.062
- Midnight Purple #280137 ΔE 0.070
- Jet #212529 ΔE 0.071
Use #12183D 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.