#101123
Closest named color: Rich Black (#0D1B2A). oklch(18.7% 0.036 279.8), rgb(16, 17, 35).
Aa
White text reads best on this color (18.64:1).
About this color
#101123 is a very dark, muted blue. In OKLCH its lightness is 19%, its chroma 0.036 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.035 away. White text reads best on it, at 18.64:1.
| Hue family | Blues |
| Lightness | very dark (19%) |
| Chroma | muted (0.036) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.12:1 |
| White text | 18.64:1 |
Values
| HEX | #101123 |
| RGB | rgb(16, 17, 35) |
| HSL | hsl(237, 37%, 10%) |
| OKLCH | oklch(18.7% 0.036 279.8) |
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 #101123 | 18.64:1 | AAA | Lc -107.2 | Preferred for body text |
| Black text on #101123 | 1.12:1 | Fails | Lc 0.0 | Not readable |
| #101123 text on white | 18.64:1 | AAA | Lc 105.2 | Preferred for body text |
| #101123 text on black | 1.12:1 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E8E9F2
oklch(93.6% 0.012 281.1)
-
Step 200
200
#D5D8E9
oklch(88.5% 0.023 277.9)
-
Step 300
300
#BABEDD
oklch(80.8% 0.044 279.6)
-
Step 400
400
#979CCC
oklch(70.6% 0.07 279.8)
-
Step 500
500
#7F84BE
oklch(63.2% 0.087 279.8)
-
Step 600
600
#686CAA
oklch(55.5% 0.096 280)
-
Step 700
700
#575A92
oklch(49% 0.089 280.2)
-
Step 800
800
#474A77
oklch(42.7% 0.074 279.8)
-
Step 900
900
#3B3E60
oklch(37.7% 0.058 279.3)
-
Step 950
950 (this color)
#101123
oklch(18.7% 0.036 279.8)
#101123 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) | #0B1324 | 0.010 |
| Deuteranopia (no green cones) | #0A1223 | 0.010 |
| Tritanopia (no blue cones) | #0A1518 | 0.032 |
| Achromatopsia (no color) | #131313 | 0.036 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101123
#101123
oklch(18.7% 0.036 279.8)
- #171301
#171301
oklch(18.6% 0.036 98.9)
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 #101123, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.035
- Rich Navy #001219 ΔE 0.037
- Almost Black #070D0D ΔE 0.050
- Dark Navy #000435 ΔE 0.067
- Midnight #03012D ΔE 0.069
- Dark Navy Blue #00022E ΔE 0.071
- Navy Blue #001146 ΔE 0.072
- Dark #1B2431 ΔE 0.072
Use #101123 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.