#1A5BBC
Closest named color: Mid Blue (#276AB3). oklch(48.9% 0.166 259.1), rgb(26, 91, 188).
Aa
White text reads best on this color (6.42:1).
About this color
#1A5BBC is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.166 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.047 away. White text reads best on it, at 6.42:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.166) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.26:1 |
| White text | 6.42:1 |
Values
| HEX | #1A5BBC |
| RGB | rgb(26, 91, 188) |
| HSL | hsl(216, 76%, 42%) |
| OKLCH | oklch(48.9% 0.166 259.1) |
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 #1A5BBC | 6.42:1 | AA | Lc -86.5 | Fine for body text |
| Black text on #1A5BBC | 3.26:1 | AA large text | Lc 22.7 | Dividers and decoration only |
| #1A5BBC text on white | 6.42:1 | AA | Lc 81.3 | Fine for body text |
| #1A5BBC text on black | 3.26:1 | AA large text | Lc -20.5 | 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
#E1EBFA
oklch(93.7% 0.023 258.4)
-
Step 200
200
#C8DAF7
oklch(88.4% 0.045 259.9)
-
Step 300
300
#A2C2F5
oklch(80.9% 0.081 259.6)
-
Step 400
400
#6FA1F0
oklch(70.7% 0.128 259.2)
-
Step 500
500
#4787EB
oklch(63.1% 0.165 259.1)
-
Step 600
600
#286ED9
oklch(55.5% 0.178 259.1)
-
Step 700
700 (this color)
#1A5BBC
oklch(48.9% 0.166 259.1)
-
Step 800
800
#194B98
oklch(42.6% 0.137 259.2)
-
Step 900
900
#1B4079
oklch(37.8% 0.106 258.9)
-
Step 950
950
#102647
oklch(27% 0.068 258.4)
#1A5BBC 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) | #1766BF | 0.029 |
| Deuteranopia (no green cones) | #0058BA | 0.014 |
| Tritanopia (no blue cones) | #007383 | 0.126 |
| Achromatopsia (no color) | #5F5F5F | 0.166 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1A5BBC
#1A5BBC
oklch(48.9% 0.166 259.1)
- #7F5800
#7F5800
oklch(49% 0.102 78.8)
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 #1A5BBC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.047
- Blue Blue #2242C7 ΔE 0.061
- French Blue #436BAD ΔE 0.066
- Warm Blue #4B57DB ΔE 0.068
- Denim Blue #3B5B92 ΔE 0.071
- Azul #1D5DEC ΔE 0.075
- Dusk Blue #26538D ΔE 0.076
- Peacock Blue #016795 ΔE 0.076
Use #1A5BBC 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.