#1251AF
Closest named color: Blue Blue (#2242C7). oklch(45.6% 0.162 259.3), rgb(18, 81, 175).
Aa
White text reads best on this color (7.44:1).
About this color
#1251AF is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.162 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.052 away. White text reads best on it, at 7.44:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.162) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.82:1 |
| White text | 7.44:1 |
Values
| HEX | #1251AF |
| RGB | rgb(18, 81, 175) |
| HSL | hsl(216, 81%, 38%) |
| OKLCH | oklch(45.6% 0.162 259.3) |
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 #1251AF | 7.44:1 | AAA | Lc -90.1 | Preferred for body text |
| Black text on #1251AF | 2.82:1 | Fails | Lc 18.8 | Dividers and decoration only |
| #1251AF text on white | 7.44:1 | AAA | Lc 85.2 | Fine for body text |
| #1251AF text on black | 2.82:1 | Fails | Lc -16.8 | 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 800.
-
Step 50
50
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DFEBFD
oklch(93.6% 0.028 258.4)
-
Step 200
200
#C5DBFD
oklch(88.6% 0.053 259)
-
Step 300
300
#9CC2FE
oklch(80.9% 0.095 259.4)
-
Step 400
400
#65A0FE
oklch(70.8% 0.152 259.3)
-
Step 500
500
#3884FC
oklch(63% 0.194 259.4)
-
Step 600
600
#0D6AEB
oklch(55.6% 0.211 259.3)
-
Step 700
700
#0058CB
oklch(49.1% 0.193 259.2)
-
Step 800
800 (this color)
#1251AF
oklch(45.6% 0.162 259.3)
-
Step 900
900
#113E83
oklch(37.7% 0.126 259.3)
-
Step 950
950
#0C254D
oklch(27.1% 0.08 259.5)
#1251AF 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) | #005CB2 | 0.029 |
| Deuteranopia (no green cones) | #004FAD | 0.010 |
| Tritanopia (no blue cones) | #006878 | 0.123 |
| Achromatopsia (no color) | #555555 | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1251AF
#1251AF
oklch(45.6% 0.162 259.3)
- #735000
#735000
oklch(45.7% 0.095 79.5)
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 #1251AF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.052
- Cobalt #1E488F ΔE 0.055
- Dusk Blue #26538D ΔE 0.057
- Sapphire #2138AB ΔE 0.059
- Denim Blue #3B5B92 ΔE 0.068
- Blueberry #464196 ΔE 0.069
- Light Navy #155084 ΔE 0.070
- Mid Blue #276AB3 ΔE 0.072
Use #1251AF 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.