#1178EA
Closest named color: Cerulean Blue (#056EEE). oklch(58.4% 0.193 256.1), rgb(17, 120, 234).
Aa
Black text reads best on this color (4.89:1).
About this color
#1178EA is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.193 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.027 away. Black text reads best on it, at 4.89:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.193) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.89:1 |
| White text | 4.28:1 |
Values
| HEX | #1178EA |
| RGB | rgb(17, 120, 234) |
| HSL | hsl(212, 86%, 49%) |
| OKLCH | oklch(58.4% 0.193 256.1) |
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 #1178EA | 4.28:1 | AA large text | Lc -74.4 | Content text, not long reading |
| Black text on #1178EA | 4.89:1 | AA | Lc 35.2 | Non-text elements, placeholder text |
| #1178EA text on white | 4.28:1 | AA large text | Lc 68.9 | Content text, not long reading |
| #1178EA text on black | 4.89:1 | AA | Lc -32.7 | 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
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DFEBFB
oklch(93.6% 0.025 255.6)
-
Step 200
200
#C5DBF9
oklch(88.5% 0.048 256.2)
-
Step 300
300
#9CC3F8
oklch(80.8% 0.086 256.2)
-
Step 400
400
#64A2F5
oklch(70.6% 0.138 256.2)
-
Step 500
500
#3488F1
oklch(63% 0.177 256)
-
Step 600
600 (this color)
#1178EA
oklch(58.4% 0.193 256.1)
-
Step 700
700
#005DBD
oklch(49.1% 0.169 256.1)
-
Step 800
800
#004C9C
oklch(42.7% 0.146 256)
-
Step 900
900
#0E407D
oklch(37.7% 0.116 256.3)
-
Step 950
950
#0B2649
oklch(27% 0.073 256.3)
#1178EA 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) | #3084EE | 0.037 |
| Deuteranopia (no green cones) | #0072E8 | 0.017 |
| Tritanopia (no blue cones) | #0094A6 | 0.144 |
| Achromatopsia (no color) | #7A7A7A | 0.193 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1178EA
#1178EA
oklch(58.4% 0.193 256.1)
- #A57000
#A57000
oklch(58.6% 0.123 76.1)
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 #1178EA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.027
- Clear Blue #247AFD ΔE 0.031
- Royal Blue #4169E1 ΔE 0.042
- Bright Blue #0165FC ΔE 0.055
- Neon Blue #4361EE ΔE 0.058
- Azul #1D5DEC ΔE 0.065
- Water Blue #0E87CC ΔE 0.066
- Windows Blue #3778BF ΔE 0.067
Use #1178EA 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.