#1B54BB
Closest named color: Blue Blue (#2242C7). oklch(47.4% 0.173 261.2), rgb(27, 84, 187).
Aa
White text reads best on this color (6.92:1).
About this color
#1B54BB is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.173 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.045 away. White text reads best on it, at 6.92:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.173) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.03:1 |
| White text | 6.92:1 |
Values
| HEX | #1B54BB |
| RGB | rgb(27, 84, 187) |
| HSL | hsl(219, 75%, 42%) |
| OKLCH | oklch(47.4% 0.173 261.2) |
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 #1B54BB | 6.92:1 | AA | Lc -88.3 | Fine for body text |
| Black text on #1B54BB | 3.03:1 | AA large text | Lc 20.7 | Dividers and decoration only |
| #1B54BB text on white | 6.92:1 | AA | Lc 83.3 | Fine for body text |
| #1B54BB text on black | 3.03:1 | AA large text | Lc -18.6 | Dividers and decoration only |
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 700.
-
Step 50
50
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EAFB
oklch(93.5% 0.025 263.3)
-
Step 200
200
#C8DAF9
oklch(88.5% 0.047 261.4)
-
Step 300
300
#A2C2F7
oklch(80.9% 0.083 260.4)
-
Step 400
400
#70A0F4
oklch(70.8% 0.134 261)
-
Step 500
500
#4A85EF
oklch(63% 0.171 261.1)
-
Step 600
600
#2D6CDE
oklch(55.6% 0.186 261.1)
-
Step 700
700 (this color)
#1B54BB
oklch(47.4% 0.173 261.2)
-
Step 800
800
#1C4A9C
oklch(42.8% 0.143 260.9)
-
Step 900
900
#1D3E7C
oklch(37.6% 0.112 261.6)
-
Step 950
950
#112548
oklch(26.9% 0.07 260.7)
#1B54BB 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) | #0061BF | 0.033 |
| Deuteranopia (no green cones) | #0053B9 | 0.012 |
| Tritanopia (no blue cones) | #006E7F | 0.134 |
| Achromatopsia (no color) | #5A5A5A | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B54BB
#1B54BB
oklch(47.4% 0.173 261.2)
- #785500
#785500
oklch(47.4% 0.098 80.9)
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 #1B54BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.045
- Mid Blue #276AB3 ΔE 0.064
- Majorelle Blue #3F37C9 ΔE 0.069
- Sapphire #2138AB ΔE 0.071
- Warm Blue #4B57DB ΔE 0.071
- Dusk Blue #26538D ΔE 0.074
- Cobalt #1E488F ΔE 0.076
- Denim Blue #3B5B92 ΔE 0.076
Use #1B54BB 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.