#10143B
Closest named color: Navy Blue (#001146). oklch(21.5% 0.074 273.9), rgb(16, 20, 59).
Aa
White text reads best on this color (17.71:1).
About this color
#10143B is a very dark, moderately saturated blue. In OKLCH its lightness is 22%, its chroma 0.074 and its hue 274°. 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 17.71:1.
| Hue family | Blues |
| Lightness | very dark (22%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.18:1 |
| White text | 17.71:1 |
Values
| HEX | #10143B |
| RGB | rgb(16, 20, 59) |
| HSL | hsl(234, 57%, 15%) |
| OKLCH | oklch(21.5% 0.074 273.9) |
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 #10143B | 17.71:1 | AAA | Lc -106.6 | Preferred for body text |
| Black text on #10143B | 1.18:1 | Fails | Lc 0.0 | Not readable |
| #10143B text on white | 17.71:1 | AAA | Lc 104.3 | Preferred for body text |
| #10143B 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
#E4E9FC
oklch(93.6% 0.026 274.1)
-
Step 200
200
#CFD8FA
oklch(88.6% 0.048 273.7)
-
Step 300
300
#AEBDFA
oklch(80.9% 0.088 273.6)
-
Step 400
400
#8698F8
oklch(70.7% 0.142 274.2)
-
Step 500
500
#6A7BF4
oklch(63% 0.18 274)
-
Step 600
600
#5461E3
oklch(55.6% 0.195 273.9)
-
Step 700
700
#454FC5
oklch(49.1% 0.182 273.9)
-
Step 800
800
#3842A0
oklch(42.8% 0.151 273.6)
-
Step 900
900
#30397F
oklch(37.8% 0.118 273.9)
-
Step 950
950 (this color)
#10143B
oklch(21.5% 0.074 273.9)
#10143B 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 | 0.025 |
| Deuteranopia (no green cones) | #00163A | 0.022 |
| Tritanopia (no blue cones) | #001D25 | 0.061 |
| Achromatopsia (no color) | #181818 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #10143B
#10143B
oklch(21.5% 0.074 273.9)
- #201900
#201900
oklch(21.6% 0.044 94.9)
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 #10143B, 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 0.044
- Night Blue #040348 ΔE 0.052
- Dark Indigo #1F0954 ΔE 0.056
- Dark Navy #000435 ΔE 0.061
- Oxford Blue #1B263B ΔE 0.064
- Dark #1B2431 ΔE 0.065
- Midnight Purple #280137 ΔE 0.065
Use #10143B 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.