#1987E4
Closest named color: Dark Sky Blue (#448EE4). oklch(61.4% 0.167 250.6), rgb(25, 135, 228).
Aa
Black text reads best on this color (5.62:1).
About this color
#1987E4 is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.167 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.033 away. Black text reads best on it, at 5.62:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.167) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.62:1 |
| White text | 3.73:1 |
Values
| HEX | #1987E4 |
| RGB | rgb(25, 135, 228) |
| HSL | hsl(207, 80%, 50%) |
| OKLCH | oklch(61.4% 0.167 250.6) |
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 #1987E4 | 3.73:1 | AA large text | Lc -69.8 | Content text, not long reading |
| Black text on #1987E4 | 5.62:1 | AA | Lc 39.8 | Non-text elements, placeholder text |
| #1987E4 text on white | 3.73:1 | AA large text | Lc 64.3 | Content text, not long reading |
| #1987E4 text on black | 5.62:1 | AA | Lc -37.4 | 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
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DFEBFA
oklch(93.6% 0.024 254)
-
Step 200
200
#C3DCF7
oklch(88.5% 0.046 250.4)
-
Step 300
300
#99C5F4
oklch(80.9% 0.082 250.5)
-
Step 400
400
#5DA5EF
oklch(70.7% 0.131 250.8)
-
Step 500
500 (this color)
#1987E4
oklch(61.4% 0.167 250.6)
-
Step 600
600
#0075CC
oklch(55.6% 0.16 250.6)
-
Step 700
700
#0062AD
oklch(49.1% 0.142 250.8)
-
Step 800
800
#00508F
oklch(42.6% 0.123 250.8)
-
Step 900
900
#004378
oklch(37.8% 0.108 250.3)
-
Step 950
950
#062747
oklch(26.9% 0.07 251.5)
#1987E4 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) | #588EE8 | 0.050 |
| Deuteranopia (no green cones) | #357CE2 | 0.029 |
| Tritanopia (no blue cones) | #009DAA | 0.121 |
| Achromatopsia (no color) | #848484 | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1987E4
#1987E4
oklch(61.4% 0.167 250.6)
- #B67400
#B67400
oklch(61.5% 0.133 70.4)
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 #1987E4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.033
- Water Blue #0E87CC ΔE 0.038
- Dodger Blue #1E90FF ΔE 0.045
- Chefchaouen Blue #4895EF ΔE 0.052
- Clear Blue #247AFD ΔE 0.053
- Soft Blue #6488EA ΔE 0.057
- Windows Blue #3778BF ΔE 0.063
- Cool Blue #4984B8 ΔE 0.069
Use #1987E4 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.