#1B5BC2
Closest named color: Mid Blue (#276AB3). oklch(49.4% 0.174 260), rgb(27, 91, 194).
Aa
White text reads best on this color (6.32:1).
About this color
#1B5BC2 is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.174 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.051 away. White text reads best on it, at 6.32:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.174) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.32:1 |
| White text | 6.32:1 |
Values
| HEX | #1B5BC2 |
| RGB | rgb(27, 91, 194) |
| HSL | hsl(217, 76%, 43%) |
| OKLCH | oklch(49.4% 0.174 260) |
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 #1B5BC2 | 6.32:1 | AA | Lc -86.0 | Fine for body text |
| Black text on #1B5BC2 | 3.32:1 | AA large text | Lc 23.2 | Dividers and decoration only |
| #1B5BC2 text on white | 6.32:1 | AA | Lc 80.8 | Fine for body text |
| #1B5BC2 text on black | 3.32:1 | AA large text | Lc -21.0 | 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
#E1EBFB
oklch(93.7% 0.024 259.8)
-
Step 200
200
#C7DAF9
oklch(88.4% 0.048 260.2)
-
Step 300
300
#A1C2F7
oklch(80.9% 0.084 259.8)
-
Step 400
400
#6EA0F4
oklch(70.7% 0.135 260.3)
-
Step 500
500
#4686F0
oklch(63.1% 0.172 259.9)
-
Step 600
600
#276DDE
oklch(55.7% 0.186 259.9)
-
Step 700
700 (this color)
#1B5BC2
oklch(49.4% 0.174 260)
-
Step 800
800
#184A9C
oklch(42.7% 0.144 260)
-
Step 900
900
#1A3F7C
oklch(37.7% 0.112 259.9)
-
Step 950
950
#102549
oklch(26.9% 0.072 260.4)
#1B5BC2 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) | #0468C6 | 0.033 |
| Deuteranopia (no green cones) | #0059C0 | 0.013 |
| Tritanopia (no blue cones) | #007485 | 0.133 |
| Achromatopsia (no color) | #606060 | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B5BC2
#1B5BC2
oklch(49.4% 0.174 260)
- #805A00
#805A00
oklch(49.5% 0.103 80)
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 #1B5BC2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.051
- Blue Blue #2242C7 ΔE 0.059
- Warm Blue #4B57DB ΔE 0.060
- Azul #1D5DEC ΔE 0.065
- French Blue #436BAD ΔE 0.070
- Royal Blue #4169E1 ΔE 0.070
- Iris #6258C4 ΔE 0.077
- Denim Blue #3B5B92 ΔE 0.079
Use #1B5BC2 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.