#1881CF
Closest named color: Water Blue (#0E87CC). oklch(58.7% 0.148 247.6), rgb(24, 129, 207).
Aa
Black text reads best on this color (5.07:1).
About this color
#1881CF is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.148 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.018 away. Black text reads best on it, at 5.07:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.148) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.07:1 |
| White text | 4.13:1 |
Values
| HEX | #1881CF |
| RGB | rgb(24, 129, 207) |
| HSL | hsl(206, 79%, 45%) |
| OKLCH | oklch(58.7% 0.148 247.6) |
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 #1881CF | 4.13:1 | AA large text | Lc -73.4 | Content text, not long reading |
| Black text on #1881CF | 5.07:1 | AA | Lc 36.2 | Non-text elements, placeholder text |
| #1881CF text on white | 4.13:1 | AA large text | Lc 67.9 | Content text, not long reading |
| #1881CF text on black | 5.07:1 | AA | Lc -33.8 | 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 600.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0EBF6
oklch(93.5% 0.019 248)
-
Step 200
200
#C6DCF1
oklch(88.5% 0.037 247)
-
Step 300
300
#9FC5EA
oklch(80.9% 0.066 248)
-
Step 400
400
#68A6E0
oklch(70.7% 0.107 248)
-
Step 500
500
#398FD7
oklch(63.2% 0.136 247.4)
-
Step 600
600 (this color)
#1881CF
oklch(58.7% 0.148 247.6)
-
Step 700
700
#0064A6
oklch(49.1% 0.131 247.6)
-
Step 800
800
#005289
oklch(42.7% 0.113 247.3)
-
Step 900
900
#10446E
oklch(37.6% 0.089 247.9)
-
Step 950
950
#0C2840
oklch(26.9% 0.056 247.6)
#1881CF 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) | #5B85D2 | 0.052 |
| Deuteranopia (no green cones) | #3F76CE | 0.034 |
| Tritanopia (no blue cones) | #00949E | 0.106 |
| Achromatopsia (no color) | #7D7D7D | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1881CF
#1881CF
oklch(58.7% 0.148 247.6)
- #AE6B00
#AE6B00
oklch(58.7% 0.129 67.7)
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 #1881CF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.018
- Windows Blue #3778BF ΔE 0.032
- Cool Blue #4984B8 ΔE 0.048
- Steel Blue #4682B4 ΔE 0.049
- Nice Blue #107AB0 ΔE 0.050
- Dark Sky Blue #448EE4 ΔE 0.056
- Blue NCS #118AB2 ΔE 0.057
- Flat Blue #3C73A8 ΔE 0.065
Use #1881CF 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.