#277FFA
Closest named color: Clear Blue (#247AFD). oklch(61.4% 0.201 258.2), rgb(39, 127, 250).
Aa
Black text reads best on this color (5.50:1).
About this color
#277FFA is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.201 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.014 away. Black text reads best on it, at 5.50:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.201) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.50:1 |
| White text | 3.81:1 |
Values
| HEX | #277FFA |
| RGB | rgb(39, 127, 250) |
| HSL | hsl(215, 95%, 57%) |
| OKLCH | oklch(61.4% 0.201 258.2) |
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 #277FFA | 3.81:1 | AA large text | Lc -70.6 | Content text, not long reading |
| Black text on #277FFA | 5.50:1 | AA | Lc 39.0 | Non-text elements, placeholder text |
| #277FFA text on white | 3.81:1 | AA large text | Lc 65.1 | Content text, not long reading |
| #277FFA text on black | 5.50:1 | AA | Lc -36.6 | 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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DEEBFD
oklch(93.6% 0.028 256.5)
-
Step 200
200
#C3DBFE
oklch(88.5% 0.055 257.7)
-
Step 300
300
#9AC3FF
oklch(81% 0.096 257.8)
-
Step 400
400
#61A0FF
oklch(70.6% 0.154 258.4)
-
Step 500
500 (this color)
#277FFA
oklch(61.4% 0.201 258.2)
-
Step 600
600
#006BE9
oklch(55.5% 0.208 258.3)
-
Step 700
700
#005AC6
oklch(49.1% 0.184 258.2)
-
Step 800
800
#0049A4
oklch(42.7% 0.16 258.3)
-
Step 900
900
#083E85
oklch(37.7% 0.131 258)
-
Step 950
950
#08254E
oklch(27% 0.083 258)
#277FFA 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) | #318CFE | 0.035 |
| Deuteranopia (no green cones) | #007AF8 | 0.019 |
| Tritanopia (no blue cones) | #009DB1 | 0.153 |
| Achromatopsia (no color) | #838383 | 0.201 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #277FFA
#277FFA
oklch(61.4% 0.201 258.2)
- #AE7900
#AE7900
oklch(61.4% 0.128 78)
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 #277FFA, closest first.
No curated palette has a color within ΔE 0.04 of #277FFA.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.014
- Dodger Blue #1E90FF ΔE 0.043
- Cerulean Blue #056EEE ΔE 0.050
- Cornflower #6A79F7 ΔE 0.059
- Dark Sky Blue #448EE4 ΔE 0.060
- Royal Blue #4169E1 ΔE 0.062
- Soft Blue #6488EA ΔE 0.064
- Bright Blue #0165FC ΔE 0.067
Use #277FFA 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.