#187EEE
Closest named color: Clear Blue (#247AFD). oklch(60.1% 0.19 255.5), rgb(24, 126, 238).
Aa
Black text reads best on this color (5.25:1).
About this color
#187EEE is a medium-dark, vivid blue. In OKLCH its lightness is 60%, its chroma 0.190 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.026 away. Black text reads best on it, at 5.25:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.190) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.25:1 |
| White text | 3.99:1 |
Values
| HEX | #187EEE |
| RGB | rgb(24, 126, 238) |
| HSL | hsl(211, 86%, 51%) |
| OKLCH | oklch(60.1% 0.19 255.5) |
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 #187EEE | 3.99:1 | AA large text | Lc -72.1 | Content text, not long reading |
| Black text on #187EEE | 5.25:1 | AA | Lc 37.5 | Non-text elements, placeholder text |
| #187EEE text on white | 3.99:1 | AA large text | Lc 66.6 | Content text, not long reading |
| #187EEE text on black | 5.25:1 | AA | Lc -35.1 | 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
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DEEBFC
oklch(93.5% 0.027 255.1)
-
Step 200
200
#C3DBFC
oklch(88.4% 0.052 256.4)
-
Step 300
300
#99C4FC
oklch(81% 0.092 255.3)
-
Step 400
400
#5DA2FB
oklch(70.7% 0.149 255.6)
-
Step 500
500 (this color)
#187EEE
oklch(60.1% 0.19 255.5)
-
Step 600
600
#0070DC
oklch(55.6% 0.186 255.4)
-
Step 700
700
#005EBB
oklch(49.1% 0.165 255.5)
-
Step 800
800
#004D9B
oklch(42.8% 0.143 255.4)
-
Step 900
900
#024081
oklch(37.7% 0.124 255.3)
-
Step 950
950
#07264C
oklch(27.1% 0.079 255.8)
#187EEE 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) | #3C89F2 | 0.038 |
| Deuteranopia (no green cones) | #0077EC | 0.020 |
| Tritanopia (no blue cones) | #0099AA | 0.142 |
| Achromatopsia (no color) | #7F7F7F | 0.190 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #187EEE
#187EEE
oklch(60.1% 0.19 255.5)
- #AB7400
#AB7400
oklch(60.1% 0.126 75.9)
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 #187EEE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.026
- Cerulean Blue #056EEE ΔE 0.042
- Dodger Blue #1E90FF ΔE 0.052
- Royal Blue #4169E1 ΔE 0.055
- Dark Sky Blue #448EE4 ΔE 0.057
- Water Blue #0E87CC ΔE 0.061
- Bright Blue #0165FC ΔE 0.067
- Soft Blue #6488EA ΔE 0.068
Use #187EEE 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.