#1255AC
Closest named color: Dusk Blue (#26538D). oklch(46.2% 0.154 257.6), rgb(18, 85, 172).
Aa
White text reads best on this color (7.18:1).
About this color
#1255AC is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.154 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.050 away. White text reads best on it, at 7.18:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.92:1 |
| White text | 7.18:1 |
Values
| HEX | #1255AC |
| RGB | rgb(18, 85, 172) |
| HSL | hsl(214, 81%, 37%) |
| OKLCH | oklch(46.2% 0.154 257.6) |
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 #1255AC | 7.18:1 | AAA | Lc -89.3 | Fine for body text |
| Black text on #1255AC | 2.92:1 | Fails | Lc 19.7 | Dividers and decoration only |
| #1255AC text on white | 7.18:1 | AAA | Lc 84.4 | Fine for body text |
| #1255AC text on black | 2.92:1 | Fails | Lc -17.6 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF9
oklch(93.7% 0.022 256.7)
-
Step 200
200
#C8DBF5
oklch(88.5% 0.041 256.2)
-
Step 300
300
#A3C3F1
oklch(81% 0.074 257.4)
-
Step 400
400
#70A2EA
oklch(70.7% 0.119 257.5)
-
Step 500
500
#4989E3
oklch(63.1% 0.151 257.3)
-
Step 600
600
#2A71D1
oklch(55.7% 0.164 257.3)
-
Step 700
700 (this color)
#1255AC
oklch(46.2% 0.154 257.6)
-
Step 800
800
#1A4D93
oklch(42.7% 0.127 257.5)
-
Step 900
900
#1C4175
oklch(37.8% 0.099 257.5)
-
Step 950
950
#112645
oklch(27% 0.064 258.1)
#1255AC 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) | #1D5EAF | 0.027 |
| Deuteranopia (no green cones) | #0051AA | 0.014 |
| Tritanopia (no blue cones) | #006A78 | 0.116 |
| Achromatopsia (no color) | #575757 | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1255AC
#1255AC
oklch(46.2% 0.154 257.6)
- #765000
#765000
oklch(46.1% 0.096 77.2)
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 #1255AC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.050
- Cobalt #1E488F ΔE 0.056
- Denim Blue #3B5B92 ΔE 0.058
- Mid Blue #276AB3 ΔE 0.062
- Blue Blue #2242C7 ΔE 0.062
- Light Navy Blue #2E5A88 ΔE 0.065
- Light Navy #155084 ΔE 0.065
- Peacock Blue #016795 ΔE 0.068
Use #1255AC 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.