#027FDB
Closest named color: Water Blue (#0E87CC). oklch(58.8% 0.167 250.3), rgb(2, 127, 219).
Aa
Black text reads best on this color (5.06:1).
About this color
#027FDB is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.167 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.035 away. Black text reads best on it, at 5.06:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.167) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.06:1 |
| White text | 4.14:1 |
Values
| HEX | #027FDB |
| RGB | rgb(2, 127, 219) |
| HSL | hsl(205, 98%, 43%) |
| OKLCH | oklch(58.8% 0.167 250.3) |
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 #027FDB | 4.14:1 | AA large text | Lc -73.3 | Content text, not long reading |
| Black text on #027FDB | 5.06:1 | AA | Lc 36.3 | Non-text elements, placeholder text |
| #027FDB text on white | 4.14:1 | AA large text | Lc 67.8 | Content text, not long reading |
| #027FDB text on black | 5.06:1 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#DFEBF8
oklch(93.5% 0.022 250.2)
-
Step 200
200
#C5DCF4
oklch(88.5% 0.041 249.4)
-
Step 300
300
#9CC5F0
oklch(80.9% 0.075 250)
-
Step 400
400
#63A5E9
oklch(70.6% 0.121 250.6)
-
Step 500
500
#308DE2
oklch(63.1% 0.154 250.2)
-
Step 600
600 (this color)
#027FDB
oklch(58.8% 0.167 250.3)
-
Step 700
700
#0062AC
oklch(49% 0.141 250.5)
-
Step 800
800
#00508E
oklch(42.6% 0.122 250.5)
-
Step 900
900
#0A4374
oklch(37.7% 0.1 250.4)
-
Step 950
950
#092844
oklch(27.1% 0.063 249.6)
#027FDB 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) | #4F86DF | 0.049 |
| Deuteranopia (no green cones) | #2875D9 | 0.026 |
| Tritanopia (no blue cones) | #0095A2 | 0.121 |
| Achromatopsia (no color) | #7C7C7C | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #027FDB
#027FDB
oklch(58.8% 0.167 250.3)
- #AC6D00
#AC6D00
oklch(58.9% 0.127 70.1)
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 #027FDB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.035
- Windows Blue #3778BF ΔE 0.046
- Cerulean Blue #056EEE ΔE 0.055
- Clear Blue #247AFD ΔE 0.056
- Dark Sky Blue #448EE4 ΔE 0.056
- Royal Blue #4169E1 ΔE 0.061
- Nice Blue #107AB0 ΔE 0.066
- Cool Blue #4984B8 ΔE 0.067
Use #027FDB 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.