#12153F
Closest named color: Navy Blue (#001146). oklch(22.3% 0.079 274.9), rgb(18, 21, 63).
Aa
White text reads best on this color (17.43:1).
About this color
#12153F is a very dark, moderately saturated blue. In OKLCH its lightness is 22%, its chroma 0.079 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Navy Blue (#001146), ΔE 0.033 away. White text reads best on it, at 17.43:1.
| Hue family | Blues |
| Lightness | very dark (22%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.20:1 |
| White text | 17.43:1 |
Values
| HEX | #12153F |
| RGB | rgb(18, 21, 63) |
| HSL | hsl(236, 56%, 16%) |
| OKLCH | oklch(22.3% 0.079 274.9) |
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 #12153F | 17.43:1 | AAA | Lc -106.4 | Preferred for body text |
| Black text on #12153F | 1.20:1 | Fails | Lc 0.0 | Not readable |
| #12153F text on white | 17.43:1 | AAA | Lc 104.1 | Preferred for body text |
| #12153F text on black | 1.20:1 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E4E9FD
oklch(93.6% 0.028 274.7)
-
Step 200
200
#CFD7FC
oklch(88.5% 0.052 275.7)
-
Step 300
300
#AFBCFD
oklch(80.9% 0.093 275.4)
-
Step 400
400
#8697FD
oklch(70.8% 0.15 274.8)
-
Step 500
500
#6B79FA
oklch(63.1% 0.19 274.9)
-
Step 600
600
#555DE9
oklch(55.5% 0.208 274.8)
-
Step 700
700
#464CCB
oklch(49.1% 0.193 274.7)
-
Step 800
800
#393FA4
oklch(42.6% 0.16 274.7)
-
Step 900
900
#313782
oklch(37.7% 0.125 275.2)
-
Step 950
950 (this color)
#12153F
oklch(22.3% 0.079 274.9)
#12153F 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) | #001C40 | 0.028 |
| Deuteranopia (no green cones) | #00183E | 0.024 |
| Tritanopia (no blue cones) | #001F27 | 0.066 |
| Achromatopsia (no color) | #1A1A1A | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #12153F
#12153F
oklch(22.3% 0.079 274.9)
- #221B00
#221B00
oklch(22.4% 0.046 95.7)
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 #12153F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.033
- Rich Black #0D1B2A ΔE 0.049
- Dark Indigo #1F0954 ΔE 0.049
- Night Blue #040348 ΔE 0.053
- Oxford Blue #1B263B ΔE 0.060
- Dark #1B2431 ΔE 0.064
- Midnight Purple #280137 ΔE 0.065
- Dark Navy #000435 ΔE 0.067
Use #12153F 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.