#1B5EC0
Closest named color: Mid Blue (#276AB3). oklch(49.9% 0.168 258.8), rgb(27, 94, 192).
Aa
White text reads best on this color (6.16:1).
About this color
#1B5EC0 is a medium-dark, vivid blue. In OKLCH its lightness is 50%, its chroma 0.168 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.043 away. White text reads best on it, at 6.16:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.168) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.40:1 |
| White text | 6.16:1 |
Values
| HEX | #1B5EC0 |
| RGB | rgb(27, 94, 192) |
| HSL | hsl(216, 75%, 43%) |
| OKLCH | oklch(49.9% 0.168 258.8) |
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 #1B5EC0 | 6.16:1 | AA | Lc -85.3 | Fine for body text |
| Black text on #1B5EC0 | 3.40:1 | AA large text | Lc 23.9 | Dividers and decoration only |
| #1B5EC0 text on white | 6.16:1 | AA | Lc 80.1 | Fine for body text |
| #1B5EC0 text on black | 3.40:1 | AA large text | Lc -21.7 | 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
#C8DBF8
oklch(88.6% 0.045 258.8)
-
Step 300
300
#A1C2F5
oklch(80.8% 0.081 259)
-
Step 400
400
#6EA1F1
oklch(70.7% 0.13 259.1)
-
Step 500
500
#4687EC
oklch(63.1% 0.166 259)
-
Step 600
600
#266EDA
oklch(55.5% 0.18 258.9)
-
Step 700
700 (this color)
#1B5EC0
oklch(49.9% 0.168 258.8)
-
Step 800
800
#174B99
oklch(42.6% 0.139 259)
-
Step 900
900
#1A407A
oklch(37.8% 0.108 258.8)
-
Step 950
950
#102647
oklch(27% 0.068 258.4)
#1B5EC0 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) | #1C69C4 | 0.030 |
| Deuteranopia (no green cones) | #005ABE | 0.016 |
| Tritanopia (no blue cones) | #007686 | 0.127 |
| Achromatopsia (no color) | #616161 | 0.168 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B5EC0
#1B5EC0
oklch(49.9% 0.168 258.8)
- #825B00
#825B00
oklch(50% 0.104 79.6)
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 #1B5EC0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.043
- French Blue #436BAD ΔE 0.062
- Warm Blue #4B57DB ΔE 0.063
- Blue Blue #2242C7 ΔE 0.067
- Royal Blue #4169E1 ΔE 0.068
- Azul #1D5DEC ΔE 0.068
- Denim Blue #3B5B92 ΔE 0.075
- Iris #6258C4 ΔE 0.076
Use #1B5EC0 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.