#1255BB
Closest named color: Blue Blue (#2242C7). oklch(47.4% 0.173 259.7), rgb(18, 85, 187).
Aa
White text reads best on this color (6.90:1).
About this color
#1255BB is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.173 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.047 away. White text reads best on it, at 6.90:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.173) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.04:1 |
| White text | 6.90:1 |
Values
| HEX | #1255BB |
| RGB | rgb(18, 85, 187) |
| HSL | hsl(216, 82%, 40%) |
| OKLCH | oklch(47.4% 0.173 259.7) |
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 #1255BB | 6.90:1 | AA | Lc -88.2 | Fine for body text |
| Black text on #1255BB | 3.04:1 | AA large text | Lc 20.9 | Dividers and decoration only |
| #1255BB text on white | 6.90:1 | AA | Lc 83.2 | Fine for body text |
| #1255BB text on black | 3.04:1 | AA large text | Lc -18.8 | 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
#6DA0F4
oklch(70.6% 0.135 260)
-
Step 500
500
#4586EF
oklch(63% 0.171 259.6)
-
Step 600
600
#266DDE
oklch(55.6% 0.187 259.7)
-
Step 700
700 (this color)
#1255BB
oklch(47.4% 0.173 259.7)
-
Step 800
800
#174A9C
oklch(42.6% 0.144 259.8)
-
Step 900
900
#193F7C
oklch(37.7% 0.112 259.6)
-
Step 950
950
#102548
oklch(26.9% 0.071 260)
#1255BB 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) | #0062BF | 0.034 |
| Deuteranopia (no green cones) | #0053B9 | 0.009 |
| Tritanopia (no blue cones) | #006E7F | 0.132 |
| Achromatopsia (no color) | #5A5A5A | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1255BB
#1255BB
oklch(47.4% 0.173 259.7)
- #795400
#795400
oklch(47.4% 0.098 79.1)
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 #1255BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.047
- Mid Blue #276AB3 ΔE 0.063
- Majorelle Blue #3F37C9 ΔE 0.072
- Sapphire #2138AB ΔE 0.073
- Warm Blue #4B57DB ΔE 0.074
- Dusk Blue #26538D ΔE 0.074
- Cobalt #1E488F ΔE 0.076
- Denim Blue #3B5B92 ΔE 0.076
Use #1255BB 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.