#101D2F
Closest named color: Rich Black (#0D1B2A). oklch(22.9% 0.04 256.7), rgb(16, 29, 47).
Aa
White text reads best on this color (16.95:1).
About this color
#101D2F is a very dark, muted blue. In OKLCH its lightness is 23%, its chroma 0.040 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.012 away. White text reads best on it, at 16.95:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | muted (0.040) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.23:1 |
| White text | 16.95:1 |
Values
| HEX | #101D2F |
| RGB | rgb(16, 29, 47) |
| HSL | hsl(215, 49%, 12%) |
| OKLCH | oklch(22.9% 0.04 256.7) |
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 #101D2F | 16.95:1 | AAA | Lc -106.2 | Preferred for body text |
| Black text on #101D2F | 1.23:1 | Fails | Lc 0.0 | Not readable |
| #101D2F text on white | 16.95:1 | AAA | Lc 103.8 | Preferred for body text |
| #101D2F 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF3
oklch(93.5% 0.014 258.3)
-
Step 200
200
#CEDAEB
oklch(88.4% 0.027 257)
-
Step 300
300
#AEC2DF
oklch(80.8% 0.047 257.6)
-
Step 400
400
#82A3D0
oklch(70.8% 0.076 256.3)
-
Step 500
500
#638BC3
oklch(63.1% 0.096 256.9)
-
Step 600
600
#4974B0
oklch(55.5% 0.106 256.9)
-
Step 700
700
#3B6197
oklch(49% 0.097 257.3)
-
Step 800
800
#31507A
oklch(42.8% 0.079 256.4)
-
Step 900
900
#2B4263
oklch(37.6% 0.064 257.4)
-
Step 950
950 (this color)
#101D2F
oklch(22.9% 0.04 256.7)
#101D2F 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) | #161E30 | 0.010 |
| Deuteranopia (no green cones) | #121B2F | 0.007 |
| Tritanopia (no blue cones) | #022123 | 0.036 |
| Achromatopsia (no color) | #1C1C1C | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101D2F
#101D2F
oklch(22.9% 0.04 256.7)
- #271A05
#271A05
oklch(22.9% 0.04 77.3)
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 #101D2F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.012
- Dark #1B2431 ΔE 0.031
- Oxford Blue #1B263B ΔE 0.041
- Jet #212529 ΔE 0.045
- Rich Navy #001219 ΔE 0.064
- Navy Blue #001146 ΔE 0.065
- Space Cadet #2B2D42 ΔE 0.078
- Almost Black #070D0D ΔE 0.084
Use #101D2F 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.