#101018
Closest named color: Rich Navy (#001219). oklch(17.7% 0.016 284.6), rgb(16, 16, 24).
Aa
White text reads best on this color (18.93:1).
About this color
#101018 is a very dark close to neutral grey. In OKLCH its lightness is 18%, its chroma 0.016. It has too little chroma to lean warm or cool. The nearest named color is Rich Navy (#001219), ΔE 0.029 away. White text reads best on it, at 18.93:1.
| Hue family | Neutrals |
| Lightness | very dark (18%) |
| Chroma | close to neutral grey (0.016) |
| Temperature | neutral |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.10:1 |
| White text | 18.93:1 |
Values
| HEX | #101018 |
| RGB | rgb(16, 16, 24) |
| HSL | hsl(240, 20%, 8%) |
| OKLCH | oklch(17.7% 0.016 284.6) |
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 #101018 | 18.93:1 | AAA | Lc -107.4 | Preferred for body text |
| Black text on #101018 | 1.10:1 | Fails | Lc 0.0 | Not readable |
| #101018 text on white | 18.93:1 | AAA | Lc 105.4 | Preferred for body text |
| #101018 text on black | 1.10:1 | 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
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#E9E9ED
oklch(93.5% 0.005 286.3)
-
Step 200
200
#D8D8E0
oklch(88.5% 0.011 286.2)
-
Step 300
300
#BFBFCD
oklch(80.9% 0.02 286)
-
Step 400
400
#9E9EB4
oklch(70.6% 0.032 285.6)
-
Step 500
500
#8687A1
oklch(63.2% 0.039 283.5)
-
Step 600
600
#70708C
oklch(55.5% 0.043 284.9)
-
Step 700
700
#5E5E77
oklch(49.1% 0.04 284.8)
-
Step 800
800
#4D4D61
oklch(42.8% 0.033 284.9)
-
Step 900
900
#40404F
oklch(37.7% 0.025 285.1)
-
Step 950
950 (this color)
#101018
oklch(17.7% 0.016 284.6)
#101018 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) | #0E1118 | 0.005 |
| Deuteranopia (no green cones) | #0E1018 | 0.004 |
| Tritanopia (no blue cones) | #0E1113 | 0.013 |
| Achromatopsia (no color) | #111111 | 0.016 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101018
#101018
oklch(17.7% 0.016 284.6)
- #121109
#121109
oklch(17.6% 0.016 101.9)
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 #101018, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.029
- Almost Black #070D0D ΔE 0.031
- Rich Black #0D1B2A ΔE 0.047
- Very Dark Brown #1D0200 ΔE 0.067
- Midnight #03012D ΔE 0.080
- Dark Navy Blue #00022E ΔE 0.082
- Dark Navy #000435 ΔE 0.082
- Dark #1B2431 ΔE 0.082
Use #101018 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.