#101B3E
Closest named color: Rich Black (#0D1B2A). oklch(23.5% 0.069 267.7), rgb(16, 27, 62).
Aa
White text reads best on this color (16.82:1).
About this color
#101B3E is a very dark, muted blue. In OKLCH its lightness is 23%, its chroma 0.069 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.040 away. White text reads best on it, at 16.82:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.24:1 |
| White text | 16.82:1 |
Values
| HEX | #101B3E |
| RGB | rgb(16, 27, 62) |
| HSL | hsl(226, 59%, 15%) |
| OKLCH | oklch(23.5% 0.069 267.7) |
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 #101B3E | 16.82:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #101B3E | 1.24:1 | Fails | Lc 0.0 | Not readable |
| #101B3E text on white | 16.82:1 | AAA | Lc 103.6 | Preferred for body text |
| #101B3E 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
#CCD9F8
oklch(88.5% 0.045 267.4)
-
Step 300
300
#AABFF6
oklch(80.8% 0.082 268.3)
-
Step 400
400
#7D9DF2
oklch(70.8% 0.13 267.4)
-
Step 500
500
#5E81ED
oklch(63% 0.167 267.9)
-
Step 600
600
#4668DB
oklch(55.6% 0.18 267.7)
-
Step 700
700
#3856BE
oklch(49.1% 0.167 267.7)
-
Step 800
800
#2E479A
oklch(42.7% 0.139 267.6)
-
Step 900
900
#293C7A
oklch(37.6% 0.108 268.1)
-
Step 950
950 (this color)
#101B3E
oklch(23.5% 0.069 267.7)
#101B3E 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) | #081F3F | 0.014 |
| Deuteranopia (no green cones) | #011B3D | 0.018 |
| Tritanopia (no blue cones) | #002329 | 0.057 |
| Achromatopsia (no color) | #1D1D1D | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101B3E
#101B3E
oklch(23.5% 0.069 267.7)
- #281C00
#281C00
oklch(23.5% 0.048 86.2)
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 #101B3E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.040
- Navy Blue #001146 ΔE 0.042
- Oxford Blue #1B263B ΔE 0.044
- Dark #1B2431 ΔE 0.048
- Dark Indigo #1F0954 ΔE 0.061
- Jet #212529 ΔE 0.066
- Night Blue #040348 ΔE 0.068
- Space Cadet #2B2D42 ΔE 0.077
Use #101B3E 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.