#187ECF
Closest named color: Water Blue (#0E87CC). oklch(58.1% 0.151 249.1), rgb(24, 126, 207).
Aa
Black text reads best on this color (4.92:1).
About this color
#187ECF is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.151 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.026 away. Black text reads best on it, at 4.92:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 4.92:1 |
| White text | 4.26:1 |
Values
| HEX | #187ECF |
| RGB | rgb(24, 126, 207) |
| HSL | hsl(207, 79%, 45%) |
| OKLCH | oklch(58.1% 0.151 249.1) |
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 #187ECF | 4.26:1 | AA large text | Lc -74.4 | Content text, not long reading |
| Black text on #187ECF | 4.92:1 | AA | Lc 35.2 | Non-text elements, placeholder text |
| #187ECF text on white | 4.26:1 | AA large text | Lc 68.9 | Content text, not long reading |
| #187ECF text on black | 4.92:1 | AA | Lc -32.7 | 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
#E0EBF7
oklch(93.5% 0.02 250.4)
-
Step 200
200
#C7DCF2
oklch(88.6% 0.038 249.5)
-
Step 300
300
#9FC5EB
oklch(80.9% 0.068 248.7)
-
Step 400
400
#68A6E2
oklch(70.8% 0.109 248.9)
-
Step 500
500
#3A8ED9
oklch(63.1% 0.139 248.9)
-
Step 600
600 (this color)
#187ECF
oklch(58.1% 0.151 249.1)
-
Step 700
700
#0063A9
oklch(49% 0.136 249.1)
-
Step 800
800
#03518B
oklch(42.7% 0.116 249.2)
-
Step 900
900
#11446F
oklch(37.7% 0.09 248.7)
-
Step 950
950
#0C2841
oklch(27% 0.058 248.6)
#187ECF 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) | #5683D2 | 0.049 |
| Deuteranopia (no green cones) | #3973CD | 0.031 |
| Tritanopia (no blue cones) | #00929C | 0.110 |
| Achromatopsia (no color) | #7A7A7A | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #187ECF
#187ECF
oklch(58.1% 0.151 249.1)
- #AA6A00
#AA6A00
oklch(58% 0.127 68.8)
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 #187ECF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.026
- Windows Blue #3778BF ΔE 0.029
- Nice Blue #107AB0 ΔE 0.049
- Cool Blue #4984B8 ΔE 0.053
- Steel Blue #4682B4 ΔE 0.053
- Dark Sky Blue #448EE4 ΔE 0.061
- Flat Blue #3C73A8 ΔE 0.062
- Blue NCS #118AB2 ΔE 0.063
Use #187ECF 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.