#101B3D
Closest named color: Rich Black (#0D1B2A). oklch(23.4% 0.067 267.5), rgb(16, 27, 61).
Aa
White text reads best on this color (16.85:1).
About this color
#101B3D is a very dark, muted blue. In OKLCH its lightness is 23%, its chroma 0.067 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.038 away. White text reads best on it, at 16.85:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.24:1 |
| White text | 16.85:1 |
Values
| HEX | #101B3D |
| RGB | rgb(16, 27, 61) |
| HSL | hsl(225, 58%, 15%) |
| OKLCH | oklch(23.4% 0.067 267.5) |
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 #101B3D | 16.85:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #101B3D | 1.24:1 | Fails | Lc 0.0 | Not readable |
| #101B3D text on white | 16.85:1 | AAA | Lc 103.6 | Preferred for body text |
| #101B3D text on black | 1.24:1 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFA
oklch(93.6% 0.023 266.9)
-
Step 200
200
#CCD9F7
oklch(88.5% 0.044 266.9)
-
Step 300
300
#AAC0F5
oklch(81% 0.079 267.1)
-
Step 400
400
#7E9DF0
oklch(70.7% 0.127 267.6)
-
Step 500
500
#5E82EB
oklch(63.1% 0.163 267.4)
-
Step 600
600
#4669D9
oklch(55.6% 0.176 267.4)
-
Step 700
700
#3856BC
oklch(49% 0.164 267.6)
-
Step 800
800
#2F4798
oklch(42.6% 0.136 267.8)
-
Step 900
900
#293D79
oklch(37.8% 0.105 267.4)
-
Step 950
950 (this color)
#101B3D
oklch(23.4% 0.067 267.5)
#101B3D 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) | #091F3E | 0.014 |
| Deuteranopia (no green cones) | #021B3C | 0.017 |
| Tritanopia (no blue cones) | #002329 | 0.056 |
| Achromatopsia (no color) | #1D1D1D | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101B3D
#101B3D
oklch(23.4% 0.067 267.5)
- #271C00
#271C00
oklch(23.3% 0.048 88.1)
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 #101B3D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.038
- Navy Blue #001146 ΔE 0.043
- Oxford Blue #1B263B ΔE 0.043
- Dark #1B2431 ΔE 0.046
- Dark Indigo #1F0954 ΔE 0.062
- Jet #212529 ΔE 0.065
- Night Blue #040348 ΔE 0.068
- Midnight Purple #280137 ΔE 0.077
Use #101B3D 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.