#101D33
Closest named color: Rich Black (#0D1B2A). oklch(23.1% 0.047 260.4), rgb(16, 29, 51).
Aa
White text reads best on this color (16.85:1).
About this color
#101D33 is a very dark, muted blue. In OKLCH its lightness is 23%, its chroma 0.047 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.019 away. White text reads best on it, at 16.85:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | muted (0.047) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.24:1 |
| White text | 16.85:1 |
Values
| HEX | #101D33 |
| RGB | rgb(16, 29, 51) |
| HSL | hsl(218, 52%, 13%) |
| OKLCH | oklch(23.1% 0.047 260.4) |
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 #101D33 | 16.85:1 | AAA | Lc -106.1 | Preferred for body text |
| Black text on #101D33 | 1.24:1 | Fails | Lc 0.0 | Not readable |
| #101D33 text on white | 16.85:1 | AAA | Lc 103.7 | Preferred for body text |
| #101D33 text on black | 1.24:1 | 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
#F3F6FB
oklch(97.2% 0.007 260.7)
-
Step 100
100
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CEDAEE
oklch(88.5% 0.03 260.7)
-
Step 300
300
#ACC2E5
oklch(80.9% 0.055 259.6)
-
Step 400
400
#81A1D8
oklch(70.6% 0.089 261)
-
Step 500
500
#6189CD
oklch(63% 0.112 260.6)
-
Step 600
600
#4772BA
oklch(55.5% 0.122 260.2)
-
Step 700
700
#395FA1
oklch(49.1% 0.115 260.7)
-
Step 800
800
#2F4E82
oklch(42.7% 0.094 260.2)
-
Step 900
900
#2A4168
oklch(37.6% 0.073 260.4)
-
Step 950
950 (this color)
#101D33
oklch(23.1% 0.047 260.4)
#101D33 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) | #141F34 | 0.010 |
| Deuteranopia (no green cones) | #0F1C33 | 0.004 |
| Tritanopia (no blue cones) | #002225 | 0.042 |
| Achromatopsia (no color) | #1D1D1D | 0.047 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101D33
#101D33
oklch(23.1% 0.047 260.4)
- #281A01
#281A01
oklch(23% 0.046 80.1)
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 #101D33, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.019
- Dark #1B2431 ΔE 0.032
- Oxford Blue #1B263B ΔE 0.038
- Jet #212529 ΔE 0.048
- Navy Blue #001146 ΔE 0.060
- Rich Navy #001219 ΔE 0.069
- Space Cadet #2B2D42 ΔE 0.075
- Dark Indigo #1F0954 ΔE 0.083
Use #101D33 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.