#1283D7
Closest named color: Water Blue (#0E87CC). oklch(59.6% 0.157 248.5), rgb(18, 131, 215).
Aa
Black text reads best on this color (5.25:1).
About this color
#1283D7 is a medium-dark, vivid blue. In OKLCH its lightness is 60%, its chroma 0.157 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.022 away. Black text reads best on it, at 5.25:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.157) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.25:1 |
| White text | 3.99:1 |
Values
| HEX | #1283D7 |
| RGB | rgb(18, 131, 215) |
| HSL | hsl(206, 85%, 46%) |
| OKLCH | oklch(59.6% 0.157 248.5) |
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 #1283D7 | 3.99:1 | AA large text | Lc -72.2 | Content text, not long reading |
| Black text on #1283D7 | 5.25:1 | AA | Lc 37.4 | Non-text elements, placeholder text |
| #1283D7 text on white | 3.99:1 | AA large text | Lc 66.7 | Content text, not long reading |
| #1283D7 text on black | 5.25:1 | AA | Lc -35.0 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DFECF8
oklch(93.7% 0.021 245.9)
-
Step 200
200
#C4DCF5
oklch(88.5% 0.043 249.4)
-
Step 300
300
#9AC5F0
oklch(80.8% 0.076 248.8)
-
Step 400
400
#5EA6E9
oklch(70.6% 0.123 248.4)
-
Step 500
500 (this color)
#1283D7
oklch(59.6% 0.157 248.5)
-
Step 600
600
#0077C7
oklch(55.7% 0.152 248.5)
-
Step 700
700
#0064A8
oklch(49.2% 0.133 248.3)
-
Step 800
800
#00518B
oklch(42.6% 0.117 248.8)
-
Step 900
900
#014475
oklch(37.8% 0.102 248.5)
-
Step 950
950
#062844
oklch(27% 0.065 248)
#1283D7 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) | #5988DA | 0.052 |
| Deuteranopia (no green cones) | #3A78D5 | 0.032 |
| Tritanopia (no blue cones) | #0097A2 | 0.112 |
| Achromatopsia (no color) | #7F7F7F | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1283D7
#1283D7
oklch(59.6% 0.157 248.5)
- #B16E00
#B16E00
oklch(59.7% 0.131 68.4)
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 #1283D7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.022
- Windows Blue #3778BF ΔE 0.043
- Dark Sky Blue #448EE4 ΔE 0.047
- Cool Blue #4984B8 ΔE 0.056
- Steel Blue #4682B4 ΔE 0.058
- Nice Blue #107AB0 ΔE 0.062
- Blue NCS #118AB2 ΔE 0.065
- Clear Blue #247AFD ΔE 0.065
Use #1283D7 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.