#101B2A
Closest named color: Rich Black (#0D1B2A). oklch(22% 0.034 256.4), rgb(16, 27, 42).
Aa
White text reads best on this color (17.32:1).
About this color
#101B2A is a very dark, muted blue. In OKLCH its lightness is 22%, its chroma 0.034 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.004 away. White text reads best on it, at 17.32:1.
| Hue family | Blues |
| Lightness | very dark (22%) |
| Chroma | muted (0.034) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.21:1 |
| White text | 17.32:1 |
Values
| HEX | #101B2A |
| RGB | rgb(16, 27, 42) |
| HSL | hsl(215, 45%, 11%) |
| OKLCH | oklch(22% 0.034 256.4) |
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 #101B2A | 17.32:1 | AAA | Lc -106.4 | Preferred for body text |
| Black text on #101B2A | 1.21:1 | Fails | Lc 0.0 | Not readable |
| #101B2A text on white | 17.32:1 | AAA | Lc 104.1 | Preferred for body text |
| #101B2A text on black | 1.21:1 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#D0DAE8
oklch(88.5% 0.022 256.7)
-
Step 300
300
#B0C2DB
oklch(80.8% 0.041 256.6)
-
Step 400
400
#87A3C8
oklch(70.8% 0.063 255.5)
-
Step 500
500
#698BBB
oklch(63% 0.082 257)
-
Step 600
600
#5075A7
oklch(55.6% 0.089 256.2)
-
Step 700
700
#41628F
oklch(49.1% 0.082 256.4)
-
Step 800
800
#365074
oklch(42.7% 0.068 256.7)
-
Step 900
900
#2F435E
oklch(37.9% 0.053 256.1)
-
Step 950
950 (this color)
#101B2A
oklch(22% 0.034 256.4)
#101B2A 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) | #151C2B | 0.009 |
| Deuteranopia (no green cones) | #12192A | 0.007 |
| Tritanopia (no blue cones) | #051E20 | 0.030 |
| Achromatopsia (no color) | #1A1A1A | 0.034 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101B2A
#101B2A
oklch(22% 0.034 256.4)
- #231807
#231807
oklch(21.8% 0.034 76.7)
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 #101B2A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.004
- Dark #1B2431 ΔE 0.039
- Jet #212529 ΔE 0.049
- Oxford Blue #1B263B ΔE 0.050
- Rich Navy #001219 ΔE 0.054
- Navy Blue #001146 ΔE 0.070
- Almost Black #070D0D ΔE 0.074
- Space Cadet #2B2D42 ΔE 0.086
Use #101B2A 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.