#101C2E
Closest named color: Rich Black (#0D1B2A). oklch(22.5% 0.039 258.3), rgb(16, 28, 46).
Aa
White text reads best on this color (17.10:1).
About this color
#101C2E is a very dark, muted blue. In OKLCH its lightness is 23%, its chroma 0.039 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.010 away. White text reads best on it, at 17.10:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.22:1 |
| White text | 17.10:1 |
Values
| HEX | #101C2E |
| RGB | rgb(16, 28, 46) |
| HSL | hsl(216, 48%, 12%) |
| OKLCH | oklch(22.5% 0.039 258.3) |
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 #101C2E | 17.10:1 | AAA | Lc -106.3 | Preferred for body text |
| Black text on #101C2E | 1.22:1 | Fails | Lc 0.0 | Not readable |
| #101C2E text on white | 17.10:1 | AAA | Lc 103.9 | Preferred for body text |
| #101C2E text on black | 1.22:1 | 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
#CFDAEB
oklch(88.5% 0.026 259)
-
Step 300
300
#AFC2DF
oklch(80.9% 0.046 258.8)
-
Step 400
400
#84A2CF
oklch(70.6% 0.074 258.3)
-
Step 500
500
#658BC3
oklch(63.2% 0.095 257.9)
-
Step 600
600
#4C74AF
oklch(55.6% 0.103 258)
-
Step 700
700
#3D6197
oklch(49.1% 0.097 258.3)
-
Step 800
800
#334F7A
oklch(42.6% 0.08 258.7)
-
Step 900
900
#2D4262
oklch(37.7% 0.061 258.6)
-
Step 950
950 (this color)
#101C2E
oklch(22.5% 0.039 258.3)
#101C2E 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) | #151D2F | 0.009 |
| Deuteranopia (no green cones) | #111A2E | 0.007 |
| Tritanopia (no blue cones) | #022022 | 0.036 |
| Achromatopsia (no color) | #1C1C1C | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101C2E
#101C2E
oklch(22.5% 0.039 258.3)
- #261905
#261905
oklch(22.5% 0.039 76.2)
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 #101C2E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.010
- Dark #1B2431 ΔE 0.035
- Oxford Blue #1B263B ΔE 0.044
- Jet #212529 ΔE 0.048
- Rich Navy #001219 ΔE 0.061
- Navy Blue #001146 ΔE 0.065
- Space Cadet #2B2D42 ΔE 0.081
- Almost Black #070D0D ΔE 0.081
Use #101C2E 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.