#177EA9
Closest named color: Nice Blue (#107AB0). oklch(55.9% 0.109 232.7), rgb(23, 126, 169).
Aa
Black text reads best on this color (4.59:1).
About this color
#177EA9 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.109 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Nice Blue (#107AB0), ΔE 0.018 away. Black text reads best on it, at 4.59:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Nice Blue (#107AB0) |
| Black text | 4.59:1 |
| White text | 4.57:1 |
Values
| HEX | #177EA9 |
| RGB | rgb(23, 126, 169) |
| HSL | hsl(198, 76%, 38%) |
| OKLCH | oklch(55.9% 0.109 232.7) |
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 #177EA9 | 4.57:1 | AA | Lc -76.8 | Fine for body text |
| Black text on #177EA9 | 4.59:1 | AA | Lc 32.8 | Non-text elements, placeholder text |
| #177EA9 text on white | 4.57:1 | AA | Lc 71.3 | Content text, not long reading |
| #177EA9 text on black | 4.59:1 | AA | Lc -30.4 | 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 600.
-
Step 50
50
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF2
oklch(93.7% 0.014 231.2)
-
Step 200
200
#C8DDE8
oklch(88.5% 0.027 230.4)
-
Step 300
300
#A2C7DB
oklch(80.9% 0.049 231.7)
-
Step 400
400
#6DA9CA
oklch(70.6% 0.079 233.5)
-
Step 500
500
#4194BC
oklch(63.2% 0.1 232.4)
-
Step 600
600 (this color)
#177EA9
oklch(55.9% 0.109 232.7)
-
Step 700
700
#006990
oklch(49% 0.101 232.9)
-
Step 800
800
#0B5675
oklch(42.7% 0.084 232.8)
-
Step 900
900
#15475E
oklch(37.6% 0.065 232.4)
-
Step 950
950
#0F2A37
oklch(27.1% 0.041 231.9)
#177EA9 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) | #687DAB | 0.069 |
| Deuteranopia (no green cones) | #5670A8 | 0.058 |
| Tritanopia (no blue cones) | #00898D | 0.063 |
| Achromatopsia (no color) | #767676 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #177EA9
#177EA9
oklch(55.9% 0.109 232.7)
- #A56031
#A56031
oklch(55.8% 0.109 52.7)
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 #177EA9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Nice Blue #107AB0 ΔE 0.018
- Cerulean #457B9D ΔE 0.032
- Blue NCS #118AB2 ΔE 0.035
- Flat Blue #3C73A8 ΔE 0.035
- Ocean #017B92 ΔE 0.037
- Teal Blue #01889F ΔE 0.038
- Steel Blue #4682B4 ΔE 0.039
- Muted Blue #3B719F ΔE 0.039
Use #177EA9 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.