#101B42
Closest named color: Navy Blue (#001146). oklch(23.8% 0.075 268.3), rgb(16, 27, 66).
Aa
White text reads best on this color (16.70:1).
About this color
#101B42 is a very dark, moderately saturated blue. In OKLCH its lightness is 24%, its chroma 0.075 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Navy Blue (#001146), ΔE 0.040 away. White text reads best on it, at 16.70:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.25:1 |
| White text | 16.70:1 |
Values
| HEX | #101B42 |
| RGB | rgb(16, 27, 66) |
| HSL | hsl(227, 61%, 16%) |
| OKLCH | oklch(23.8% 0.075 268.3) |
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 #101B42 | 16.70:1 | AAA | Lc -105.9 | Preferred for body text |
| Black text on #101B42 | 1.25:1 | Fails | Lc 0.0 | Not readable |
| #101B42 text on white | 16.70:1 | AAA | Lc 103.4 | Preferred for body text |
| #101B42 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFC
oklch(93.6% 0.026 266.6)
-
Step 200
200
#CBD9FB
oklch(88.6% 0.049 267.7)
-
Step 300
300
#A8BFFB
oklch(80.9% 0.089 268.2)
-
Step 400
400
#7B9BF9
oklch(70.6% 0.143 268.4)
-
Step 500
500
#5B7FF6
oklch(63.1% 0.182 268.2)
-
Step 600
600
#4465E5
oklch(55.7% 0.197 268.3)
-
Step 700
700
#3652C7
oklch(49% 0.185 268.4)
-
Step 800
800
#2D44A1
oklch(42.6% 0.153 268.5)
-
Step 900
900
#273B80
oklch(37.7% 0.119 268.1)
-
Step 950
950 (this color)
#101B42
oklch(23.8% 0.075 268.3)
#101B42 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) | #042043 | 0.018 |
| Deuteranopia (no green cones) | #001C41 | 0.018 |
| Tritanopia (no blue cones) | #00242B | 0.062 |
| Achromatopsia (no color) | #1E1E1E | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101B42
#101B42
oklch(23.8% 0.075 268.3)
- #281D00
#281D00
oklch(23.8% 0.049 88.6)
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 #101B42, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.040
- Oxford Blue #1B263B ΔE 0.046
- Rich Black #0D1B2A ΔE 0.047
- Dark #1B2431 ΔE 0.052
- Dark Indigo #1F0954 ΔE 0.055
- Night Blue #040348 ΔE 0.065
- Jet #212529 ΔE 0.071
- Marine #042E60 ΔE 0.075
Use #101B42 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.