#12133B
Closest named color: Navy Blue (#001146). oklch(21.5% 0.075 276.9), rgb(18, 19, 59).
Aa
White text reads best on this color (17.76:1).
About this color
#12133B is a very dark, moderately saturated blue. In OKLCH its lightness is 21%, its chroma 0.075 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Navy Blue (#001146), ΔE 0.035 away. White text reads best on it, at 17.76:1.
| Hue family | Blues |
| Lightness | very dark (21%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.18:1 |
| White text | 17.76:1 |
Values
| HEX | #12133B |
| RGB | rgb(18, 19, 59) |
| HSL | hsl(239, 53%, 15%) |
| OKLCH | oklch(21.5% 0.075 276.9) |
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 #12133B | 17.76:1 | AAA | Lc -106.6 | Preferred for body text |
| Black text on #12133B | 1.18:1 | Fails | Lc 0.0 | Not readable |
| #12133B text on white | 17.76:1 | AAA | Lc 104.4 | Preferred for body text |
| #12133B text on black | 1.18:1 | 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
#E5E9FC
oklch(93.7% 0.026 276.4)
-
Step 200
200
#D0D7FB
oklch(88.5% 0.05 276.6)
-
Step 300
300
#B1BCFA
oklch(80.9% 0.089 276.4)
-
Step 400
400
#8B96F8
oklch(70.6% 0.143 277.2)
-
Step 500
500
#7079F5
oklch(63.1% 0.183 276.7)
-
Step 600
600
#5B5EE4
oklch(55.6% 0.199 276.8)
-
Step 700
700
#4B4CC6
oklch(49% 0.185 276.8)
-
Step 800
800
#3E3FA0
oklch(42.6% 0.153 277.2)
-
Step 900
900
#34377F
oklch(37.7% 0.119 277.2)
-
Step 950
950 (this color)
#12133B
oklch(21.5% 0.075 276.9)
#12133B 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) | #001A3C | 0.029 |
| Deuteranopia (no green cones) | #00163A | 0.026 |
| Tritanopia (no blue cones) | #001D24 | 0.066 |
| Achromatopsia (no color) | #181818 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #12133B
#12133B
oklch(21.5% 0.075 276.9)
- #1F1900
#1F1900
oklch(21.4% 0.044 97.1)
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 #12133B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.035
- Rich Black #0D1B2A ΔE 0.046
- Night Blue #040348 ΔE 0.053
- Dark Indigo #1F0954 ΔE 0.054
- Dark Navy #000435 ΔE 0.061
- Midnight Purple #280137 ΔE 0.061
- Oxford Blue #1B263B ΔE 0.065
- Very Dark Purple #2A0134 ΔE 0.066
Use #12133B 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.