#177BF9
Closest named color: Clear Blue (#247AFD). oklch(60.2% 0.207 257.6), rgb(23, 123, 249).
Aa
Black text reads best on this color (5.23:1).
About this color
#177BF9 is a medium-dark, vivid blue. In OKLCH its lightness is 60%, its chroma 0.207 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.008 away. Black text reads best on it, at 5.23:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.207) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.23:1 |
| White text | 4.00:1 |
Values
| HEX | #177BF9 |
| RGB | rgb(23, 123, 249) |
| HSL | hsl(213, 95%, 53%) |
| OKLCH | oklch(60.2% 0.207 257.6) |
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 #177BF9 | 4.00:1 | AA large text | Lc -72.2 | Content text, not long reading |
| Black text on #177BF9 | 5.23:1 | AA | Lc 37.4 | Non-text elements, placeholder text |
| #177BF9 text on white | 4.00:1 | AA large text | Lc 66.6 | Content text, not long reading |
| #177BF9 text on black | 5.23:1 | AA | Lc -35.0 | 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
#DEEBFE
oklch(93.6% 0.029 257.8)
-
Step 200
200
#C2DBFF
oklch(88.5% 0.057 257.5)
-
Step 300
300
#99C3FF
oklch(80.9% 0.097 257.3)
-
Step 400
400
#5FA1FF
oklch(70.7% 0.154 257.4)
-
Step 500
500 (this color)
#177BF9
oklch(60.2% 0.207 257.6)
-
Step 600
600
#006DE6
oklch(55.7% 0.202 257.5)
-
Step 700
700
#005BC3
oklch(49.1% 0.179 257.6)
-
Step 800
800
#004AA2
oklch(42.7% 0.156 257.7)
-
Step 900
900
#023E87
oklch(37.8% 0.134 257.5)
-
Step 950
950
#06254F
oklch(27% 0.085 257.4)
#177BF9 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) | #2289FE | 0.037 |
| Deuteranopia (no green cones) | #0076F7 | 0.015 |
| Tritanopia (no blue cones) | #009AAE | 0.157 |
| Achromatopsia (no color) | #7F7F7F | 0.207 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #177BF9
#177BF9
oklch(60.2% 0.207 257.6)
- #AA7500
#AA7500
oklch(60.2% 0.126 77.2)
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 #177BF9, closest first.
No curated palette has a color within ΔE 0.04 of #177BF9.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.008
- Cerulean Blue #056EEE ΔE 0.037
- Dodger Blue #1E90FF ΔE 0.055
- Bright Blue #0165FC ΔE 0.055
- Royal Blue #4169E1 ΔE 0.056
- Neon Blue #4361EE ΔE 0.063
- Cornflower #6A79F7 ΔE 0.067
- Dark Sky Blue #448EE4 ΔE 0.070
Use #177BF9 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.