#1B41B2
Closest named color: Sapphire (#2138AB). oklch(42.8% 0.184 264.9), rgb(27, 65, 178).
Aa
White text reads best on this color (8.58:1).
About this color
#1B41B2 is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.184 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.023 away. White text reads best on it, at 8.58:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.184) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.44:1 |
| White text | 8.58:1 |
Values
| HEX | #1B41B2 |
| RGB | rgb(27, 65, 178) |
| HSL | hsl(225, 74%, 40%) |
| OKLCH | oklch(42.8% 0.184 264.9) |
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 #1B41B2 | 8.58:1 | AAA | Lc -93.3 | Preferred for body text |
| Black text on #1B41B2 | 2.44:1 | Fails | Lc 15.3 | Dividers and decoration only |
| #1B41B2 text on white | 8.58:1 | AAA | Lc 88.7 | Fine for body text |
| #1B41B2 text on black | 2.44:1 | 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
#E0EAFF
oklch(93.6% 0.03 265.3)
-
Step 200
200
#C7D9FF
oklch(88.4% 0.056 265.2)
-
Step 300
300
#A2C0FF
oklch(80.9% 0.096 264.7)
-
Step 400
400
#719CFF
oklch(70.6% 0.153 265)
-
Step 500
500
#4D80FF
oklch(63.2% 0.197 264.8)
-
Step 600
600
#2B60FC
oklch(55.7% 0.239 264.9)
-
Step 700
700
#1F4DDC
oklch(49.1% 0.223 264.9)
-
Step 800
800 (this color)
#1B41B2
oklch(42.8% 0.184 264.9)
-
Step 900
900
#1A398C
oklch(37.7% 0.143 264.7)
-
Step 950
950
#102252
oklch(27% 0.091 265.2)
#1B41B2 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) | #0053B6 | 0.043 |
| Deuteranopia (no green cones) | #0045B0 | 0.014 |
| Tritanopia (no blue cones) | #005F73 | 0.142 |
| Achromatopsia (no color) | #4C4C4C | 0.185 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B41B2
#1B41B2
oklch(42.8% 0.184 264.9)
- #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 #1B41B2, closest first.
No curated palette has a color within ΔE 0.04 of #1B41B2.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.023
- Blue Blue #2242C7 ΔE 0.035
- Majorelle Blue #3F37C9 ΔE 0.054
- Cobalt #1E488F ΔE 0.060
- Blueberry #464196 ΔE 0.067
- Indigo Blue #3A18B1 ΔE 0.072
- Blue With A Hint Of Purple #533CC6 ΔE 0.076
- Dusk Blue #26538D ΔE 0.081
Use #1B41B2 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.