#013BC1
Closest named color: Blue Blue (#2242C7). oklch(42.7% 0.214 263), rgb(1, 59, 193).
Aa
White text reads best on this color (8.76:1).
About this color
#013BC1 is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.214 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.029 away. White text reads best on it, at 8.76:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.214) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.39:1 |
| White text | 8.76:1 |
Values
| HEX | #013BC1 |
| RGB | rgb(1, 59, 193) |
| HSL | hsl(222, 99%, 38%) |
| OKLCH | oklch(42.7% 0.214 263) |
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 #013BC1 | 8.76:1 | AAA | Lc -93.3 | Preferred for body text |
| Black text on #013BC1 | 2.39:1 | Fails | Lc 15.3 | Dividers and decoration only |
| #013BC1 text on white | 8.76:1 | AAA | Lc 88.7 | Fine for body text |
| #013BC1 text on black | 2.39:1 | Fails | Lc -13.5 | 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 800.
-
Step 50
50
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#DFEAFF
oklch(93.5% 0.031 263.5)
-
Step 200
200
#C6DAFF
oklch(88.5% 0.056 262.8)
-
Step 300
300
#A0C1FF
oklch(80.9% 0.095 262.7)
-
Step 400
400
#6D9EFF
oklch(70.8% 0.152 262.8)
-
Step 500
500
#4681FF
oklch(63.1% 0.198 263.1)
-
Step 600
600
#1B60FF
oklch(55.6% 0.245 263.1)
-
Step 700
700
#0048EA
oklch(49.1% 0.249 263.1)
-
Step 800
800 (this color)
#013BC1
oklch(42.7% 0.214 263)
-
Step 900
900
#0B3698
oklch(37.8% 0.166 263)
-
Step 950
950
#082159
oklch(27% 0.106 263)
#013BC1 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) | #0053C5 | 0.055 |
| Deuteranopia (no green cones) | #0042BF | 0.015 |
| Tritanopia (no blue cones) | #006179 | 0.162 |
| Achromatopsia (no color) | #4B4B4B | 0.214 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #013BC1
#013BC1
oklch(42.7% 0.214 263)
- #664A00
#664A00
oklch(42.8% 0.088 83.6)
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 #013BC1, closest first.
No curated palette has a color within ΔE 0.04 of #013BC1.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.029
- Sapphire #2138AB ΔE 0.039
- Majorelle Blue #3F37C9 ΔE 0.054
- True Blue #010FCC ΔE 0.060
- Ultramarine Blue #1805DB ΔE 0.064
- Medium Blue #0000CD ΔE 0.068
- Pure Blue #0203E2 ΔE 0.072
- Indigo Blue #3A18B1 ΔE 0.074
Use #013BC1 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.