#101B3F
Closest named color: Navy Blue (#001146). oklch(23.6% 0.07 267.9), rgb(16, 27, 63).
Aa
White text reads best on this color (16.79:1).
About this color
#101B3F is a very dark, moderately saturated blue. In OKLCH its lightness is 24%, its chroma 0.070 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Navy Blue (#001146), ΔE 0.041 away. White text reads best on it, at 16.79:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | moderately saturated (0.070) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.25:1 |
| White text | 16.79:1 |
Values
| HEX | #101B3F |
| RGB | rgb(16, 27, 63) |
| HSL | hsl(226, 59%, 15%) |
| OKLCH | oklch(23.6% 0.07 267.9) |
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 #101B3F | 16.79:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #101B3F | 1.25:1 | Fails | Lc 0.0 | Not readable |
| #101B3F text on white | 16.79:1 | AAA | Lc 103.6 | Preferred for body text |
| #101B3F text on black | 1.25:1 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFB
oklch(93.7% 0.024 267.9)
-
Step 200
200
#CCD9F9
oklch(88.6% 0.046 267.9)
-
Step 300
300
#A9BFF7
oklch(80.8% 0.083 267.9)
-
Step 400
400
#7D9CF4
oklch(70.7% 0.134 268.2)
-
Step 500
500
#5D81EF
oklch(63.1% 0.17 267.7)
-
Step 600
600
#4567DE
oklch(55.6% 0.186 267.9)
-
Step 700
700
#3755C1
oklch(49.1% 0.173 267.8)
-
Step 800
800
#2E469C
oklch(42.7% 0.143 268)
-
Step 900
900
#283C7C
oklch(37.7% 0.111 267.7)
-
Step 950
950 (this color)
#101B3F
oklch(23.6% 0.07 267.9)
#101B3F 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) | #072040 | 0.017 |
| Deuteranopia (no green cones) | #001B3E | 0.019 |
| Tritanopia (no blue cones) | #00232A | 0.057 |
| Achromatopsia (no color) | #1D1D1D | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101B3F
#101B3F
oklch(23.6% 0.07 267.9)
- #281C00
#281C00
oklch(23.5% 0.048 86.2)
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 #101B3F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.041
- Rich Black #0D1B2A ΔE 0.042
- Oxford Blue #1B263B ΔE 0.044
- Dark #1B2431 ΔE 0.049
- Dark Indigo #1F0954 ΔE 0.059
- Night Blue #040348 ΔE 0.067
- Jet #212529 ΔE 0.067
- Space Cadet #2B2D42 ΔE 0.077
Use #101B3F 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.