#101748
Closest named color: Navy Blue (#001146). oklch(23.5% 0.091 271.3), rgb(16, 23, 72).
Aa
White text reads best on this color (16.96:1).
About this color
#101748 is a very dark, moderately saturated blue. In OKLCH its lightness is 23%, its chroma 0.091 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Navy Blue (#001146), ΔE 0.031 away. White text reads best on it, at 16.96:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.23:1 |
| White text | 16.96:1 |
Values
| HEX | #101748 |
| RGB | rgb(16, 23, 72) |
| HSL | hsl(233, 64%, 17%) |
| OKLCH | oklch(23.5% 0.091 271.3) |
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 #101748 | 16.96:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #101748 | 1.23:1 | Fails | Lc 0.0 | Not readable |
| #101748 text on white | 16.96:1 | AAA | Lc 103.6 | Preferred for body text |
| #101748 text on black | 1.23:1 | 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
#CBD8FF
oklch(88.5% 0.056 270.7)
-
Step 300
300
#AABEFF
oklch(81% 0.095 271)
-
Step 400
400
#7F99FF
oklch(70.8% 0.152 271.3)
-
Step 500
500
#607BFF
oklch(63.2% 0.197 271)
-
Step 600
600
#4759FC
oklch(55.6% 0.24 271.1)
-
Step 700
700
#3A47DC
oklch(49.1% 0.223 271.2)
-
Step 800
800
#2F3CB2
oklch(42.8% 0.185 271.1)
-
Step 900
900
#29358C
oklch(37.6% 0.144 271.6)
-
Step 950
950 (this color)
#101748
oklch(23.5% 0.091 271.3)
#101748 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) | #001F4A | 0.026 |
| Deuteranopia (no green cones) | #001A47 | 0.019 |
| Tritanopia (no blue cones) | #00232C | 0.073 |
| Achromatopsia (no color) | #1C1C1C | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101748
#101748
oklch(23.5% 0.091 271.3)
- #261D00
#261D00
oklch(23.5% 0.048 92.4)
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 #101748, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.031
- Dark Indigo #1F0954 ΔE 0.041
- Night Blue #040348 ΔE 0.053
- Oxford Blue #1B263B ΔE 0.060
- Darkblue #030764 ΔE 0.061
- Rich Black #0D1B2A ΔE 0.061
- Dark #1B2431 ΔE 0.068
- Midnight Blue #191970 ΔE 0.075
Use #101748 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.