#1A3CBC
Closest named color: Blue Blue (#2242C7). oklch(42.9% 0.203 265.7), rgb(26, 60, 188).
Aa
White text reads best on this color (8.69:1).
About this color
#1A3CBC is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.203 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.025 away. White text reads best on it, at 8.69:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.203) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.41:1 |
| White text | 8.69:1 |
Values
| HEX | #1A3CBC |
| RGB | rgb(26, 60, 188) |
| HSL | hsl(227, 76%, 42%) |
| OKLCH | oklch(42.9% 0.203 265.7) |
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 #1A3CBC | 8.69:1 | AAA | Lc -93.4 | Preferred for body text |
| Black text on #1A3CBC | 2.41:1 | Fails | Lc 15.1 | Dividers and decoration only |
| #1A3CBC text on white | 8.69:1 | AAA | Lc 88.8 | Fine for body text |
| #1A3CBC text on black | 2.41:1 | Fails | Lc -13.4 | 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
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E0EAFF
oklch(93.6% 0.03 265.3)
-
Step 200
200
#C8D9FF
oklch(88.5% 0.056 266.2)
-
Step 300
300
#A3C0FF
oklch(80.9% 0.095 265.2)
-
Step 400
400
#739CFF
oklch(70.7% 0.152 265.7)
-
Step 500
500
#507FFF
oklch(63.1% 0.197 265.8)
-
Step 600
600
#2E5EFF
oklch(55.7% 0.244 265.6)
-
Step 700
700
#1F46E8
oklch(49.1% 0.245 265.8)
-
Step 800
800 (this color)
#1A3CBC
oklch(42.9% 0.203 265.7)
-
Step 900
900
#193694
oklch(37.8% 0.158 265.7)
-
Step 950
950
#0F2156
oklch(27% 0.099 265.7)
#1A3CBC 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) | #0053C0 | 0.052 |
| Deuteranopia (no green cones) | #0044BA | 0.018 |
| Tritanopia (no blue cones) | #005F77 | 0.154 |
| Achromatopsia (no color) | #4B4B4B | 0.204 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1A3CBC
#1A3CBC
oklch(42.9% 0.203 265.7)
- #654B00
#654B00
oklch(42.9% 0.088 85.7)
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 #1A3CBC, closest first.
No curated palette has a color within ΔE 0.04 of #1A3CBC.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.025
- Sapphire #2138AB ΔE 0.029
- Majorelle Blue #3F37C9 ΔE 0.045
- Indigo Blue #3A18B1 ΔE 0.066
- True Blue #010FCC ΔE 0.069
- Ultramarine Blue #1805DB ΔE 0.074
- Blue With A Hint Of Purple #533CC6 ΔE 0.074
- Medium Blue #0000CD ΔE 0.077
Use #1A3CBC 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.