#101C3E
Closest named color: Rich Black (#0D1B2A). oklch(23.7% 0.067 266.7), rgb(16, 28, 62).
Aa
White text reads best on this color (16.69:1).
About this color
#101C3E is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.067 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.039 away. White text reads best on it, at 16.69:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.25:1 |
| White text | 16.69:1 |
Values
| HEX | #101C3E |
| RGB | rgb(16, 28, 62) |
| HSL | hsl(224, 59%, 15%) |
| OKLCH | oklch(23.7% 0.067 266.7) |
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 #101C3E | 16.69:1 | AAA | Lc -105.9 | Preferred for body text |
| Black text on #101C3E | 1.25:1 | Fails | Lc 0.0 | Not readable |
| #101C3E text on white | 16.69:1 | AAA | Lc 103.5 | Preferred for body text |
| #101C3E text on black | 1.25:1 | 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
#A9C0F5
oklch(80.9% 0.079 266.4)
-
Step 400
400
#7C9DF0
oklch(70.6% 0.128 266.7)
-
Step 500
500
#5C82EB
oklch(63% 0.163 266.8)
-
Step 600
600
#4469D9
oklch(55.5% 0.177 266.8)
-
Step 700
700
#3657BC
oklch(49.1% 0.164 266.6)
-
Step 800
800
#2D4898
oklch(42.7% 0.135 266.6)
-
Step 900
900
#283D79
oklch(37.7% 0.105 266.8)
-
Step 950
950 (this color)
#101C3E
oklch(23.7% 0.067 266.7)
#101C3E 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) | #0A203F | 0.013 |
| Deuteranopia (no green cones) | #031C3D | 0.015 |
| Tritanopia (no blue cones) | #00242A | 0.056 |
| Achromatopsia (no color) | #1E1E1E | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101C3E
#101C3E
oklch(23.7% 0.067 266.7)
- #291D00
#291D00
oklch(23.9% 0.049 86.7)
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 #101C3E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.039
- Oxford Blue #1B263B ΔE 0.040
- Navy Blue #001146 ΔE 0.045
- Dark #1B2431 ΔE 0.045
- Dark Indigo #1F0954 ΔE 0.063
- Jet #212529 ΔE 0.063
- Night Blue #040348 ΔE 0.070
- Space Cadet #2B2D42 ΔE 0.075
Use #101C3E 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.