#101E3B
Closest named color: Oxford Blue (#1B263B). oklch(24% 0.059 263.2), rgb(16, 30, 59).
Aa
White text reads best on this color (16.52:1).
About this color
#101E3B is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.059 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.033 away. White text reads best on it, at 16.52:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.27:1 |
| White text | 16.52:1 |
Values
| HEX | #101E3B |
| RGB | rgb(16, 30, 59) |
| HSL | hsl(220, 57%, 15%) |
| OKLCH | oklch(24% 0.059 263.2) |
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 #101E3B | 16.52:1 | AAA | Lc -105.8 | Preferred for body text |
| Black text on #101E3B | 1.27:1 | Fails | Lc 0.0 | Not readable |
| #101E3B text on white | 16.52:1 | AAA | Lc 103.3 | Preferred for body text |
| #101E3B text on black | 1.27:1 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E3EAF8
oklch(93.6% 0.02 264.5)
-
Step 200
200
#CCDAF4
oklch(88.6% 0.039 262.9)
-
Step 300
300
#A9C1EF
oklch(80.9% 0.07 263.3)
-
Step 400
400
#7CA0E7
oklch(70.8% 0.112 263.2)
-
Step 500
500
#5B86DF
oklch(63% 0.143 263.4)
-
Step 600
600
#416ECD
oklch(55.6% 0.155 263.2)
-
Step 700
700
#335BB1
oklch(49% 0.144 263.3)
-
Step 800
800
#2B4B90
oklch(42.7% 0.12 263.5)
-
Step 900
900
#273F73
oklch(37.7% 0.094 263.8)
-
Step 950
950 (this color)
#101E3B
oklch(24% 0.059 263.2)
#101E3B 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) | #11213C | 0.010 |
| Deuteranopia (no green cones) | #0A1D3A | 0.009 |
| Tritanopia (no blue cones) | #002529 | 0.051 |
| Achromatopsia (no color) | #1F1F1F | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101E3B
#101E3B
oklch(24% 0.059 263.2)
- #2A1D00
#2A1D00
oklch(24% 0.049 84.9)
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 #101E3B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.033
- Rich Black #0D1B2A ΔE 0.034
- Dark #1B2431 ΔE 0.036
- Navy Blue #001146 ΔE 0.052
- Jet #212529 ΔE 0.054
- Space Cadet #2B2D42 ΔE 0.069
- Dark Indigo #1F0954 ΔE 0.071
- Marine #042E60 ΔE 0.079
Use #101E3B 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.