#101B30
Closest named color: Rich Black (#0D1B2A). oklch(22.4% 0.044 262.4), rgb(16, 27, 48).
Aa
White text reads best on this color (17.19:1).
About this color
#101B30 is a very dark, muted blue. In OKLCH its lightness is 22%, its chroma 0.044 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.013 away. White text reads best on it, at 17.19:1.
| Hue family | Blues |
| Lightness | very dark (22%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.22:1 |
| White text | 17.19:1 |
Values
| HEX | #101B30 |
| RGB | rgb(16, 27, 48) |
| HSL | hsl(219, 50%, 13%) |
| OKLCH | oklch(22.4% 0.044 262.4) |
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 #101B30 | 17.19:1 | AAA | Lc -106.3 | Preferred for body text |
| Black text on #101B30 | 1.22:1 | Fails | Lc 0.0 | Not readable |
| #101B30 text on white | 17.19:1 | AAA | Lc 104.0 | Preferred for body text |
| #101B30 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
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CFDAED
oklch(88.6% 0.029 261.5)
-
Step 300
300
#AFC1E3
oklch(80.9% 0.052 263.1)
-
Step 400
400
#84A1D5
oklch(70.7% 0.083 261.8)
-
Step 500
500
#6689CA
oklch(63.2% 0.106 262.1)
-
Step 600
600
#4D72B7
oklch(55.7% 0.116 262)
-
Step 700
700
#3E5F9E
oklch(49.1% 0.109 262.2)
-
Step 800
800
#344E80
oklch(42.8% 0.089 262.4)
-
Step 900
900
#2D4167
oklch(37.7% 0.07 262.4)
-
Step 950
950 (this color)
#101B30
oklch(22.4% 0.044 262.4)
#101B30 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) | #121D31 | 0.008 |
| Deuteranopia (no green cones) | #0F1A30 | 0.004 |
| Tritanopia (no blue cones) | #012023 | 0.040 |
| Achromatopsia (no color) | #1B1B1B | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101B30
#101B30
oklch(22.4% 0.044 262.4)
- #261901
#261901
oklch(22.4% 0.045 81.3)
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 #101B30, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.013
- Dark #1B2431 ΔE 0.038
- Oxford Blue #1B263B ΔE 0.045
- Jet #212529 ΔE 0.052
- Navy Blue #001146 ΔE 0.060
- Rich Navy #001219 ΔE 0.062
- Dark Navy #000435 ΔE 0.082
- Space Cadet #2B2D42 ΔE 0.082
Use #101B30 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.