#1251B9
Closest named color: Blue Blue (#2242C7). oklch(46.4% 0.176 260.5), rgb(18, 81, 185).
Aa
White text reads best on this color (7.23:1).
About this color
#1251B9 is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.176 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.040 away. White text reads best on it, at 7.23:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.176) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.90:1 |
| White text | 7.23:1 |
Values
| HEX | #1251B9 |
| RGB | rgb(18, 81, 185) |
| HSL | hsl(217, 82%, 40%) |
| OKLCH | oklch(46.4% 0.176 260.5) |
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 #1251B9 | 7.23:1 | AAA | Lc -89.3 | Fine for body text |
| Black text on #1251B9 | 2.90:1 | Fails | Lc 19.6 | Dividers and decoration only |
| #1251B9 text on white | 7.23:1 | AAA | Lc 84.4 | Fine for body text |
| #1251B9 text on black | 2.90:1 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EBFB
oklch(93.7% 0.024 259.8)
-
Step 200
200
#C8DAF9
oklch(88.5% 0.047 261.4)
-
Step 300
300
#A1C2F8
oklch(80.9% 0.085 260.1)
-
Step 400
400
#6EA0F5
oklch(70.7% 0.136 260.5)
-
Step 500
500
#4785F1
oklch(63% 0.175 260.6)
-
Step 600
600
#286CDF
oklch(55.5% 0.189 260.4)
-
Step 700
700 (this color)
#1251B9
oklch(46.4% 0.176 260.5)
-
Step 800
800
#194A9D
oklch(42.8% 0.145 260.4)
-
Step 900
900
#1B3F7D
oklch(37.8% 0.113 260.5)
-
Step 950
950
#102549
oklch(26.9% 0.072 260.4)
#1251B9 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) | #005FBD | 0.036 |
| Deuteranopia (no green cones) | #0050B7 | 0.008 |
| Tritanopia (no blue cones) | #006B7D | 0.133 |
| Achromatopsia (no color) | #575757 | 0.176 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1251B9
#1251B9
oklch(46.4% 0.176 260.5)
- #755200
#755200
oklch(46.4% 0.096 80.1)
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 #1251B9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.040
- Sapphire #2138AB ΔE 0.062
- Majorelle Blue #3F37C9 ΔE 0.066
- Cobalt #1E488F ΔE 0.070
- Dusk Blue #26538D ΔE 0.072
- Mid Blue #276AB3 ΔE 0.073
- Blueberry #464196 ΔE 0.078
- Blue With A Hint Of Purple #533CC6 ΔE 0.079
Use #1251B9 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.