#1377A3
Closest named color: Ocean Blue (#03719C). oklch(53.8% 0.108 234.5), rgb(19, 119, 163).
Aa
White text reads best on this color (5.00:1).
About this color
#1377A3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.108 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean Blue (#03719C), ΔE 0.021 away. White text reads best on it, at 5.00:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Ocean Blue (#03719C) |
| Black text | 4.19:1 |
| White text | 5.00:1 |
Values
| HEX | #1377A3 |
| RGB | rgb(19, 119, 163) |
| HSL | hsl(198, 79%, 36%) |
| OKLCH | oklch(53.8% 0.108 234.5) |
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 #1377A3 | 5.00:1 | AA | Lc -79.6 | Fine for body text |
| Black text on #1377A3 | 4.19:1 | AA large text | Lc 29.9 | Dividers and decoration only |
| #1377A3 text on white | 5.00:1 | AA | Lc 74.1 | Content text, not long reading |
| #1377A3 text on black | 4.19:1 | AA large text | Lc -27.6 | Dividers and decoration only |
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
#C9DDE9
oklch(88.6% 0.027 234)
-
Step 300
300
#A3C6DC
oklch(80.8% 0.049 235.8)
-
Step 400
400
#6FA9CA
oklch(70.7% 0.077 234.4)
-
Step 500
500
#4493BD
oklch(63.1% 0.1 234.7)
-
Step 600
600 (this color)
#1377A3
oklch(53.8% 0.108 234.5)
-
Step 700
700
#0A6991
oklch(49.2% 0.1 234.4)
-
Step 800
800
#105676
oklch(42.8% 0.083 234.4)
-
Step 900
900
#18475F
oklch(37.8% 0.065 234.6)
-
Step 950
950
#102A37
oklch(27.1% 0.04 232.6)
#1377A3 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) | #6176A5 | 0.065 |
| Deuteranopia (no green cones) | #4F6AA2 | 0.054 |
| Tritanopia (no blue cones) | #008386 | 0.067 |
| Achromatopsia (no color) | #6F6F6F | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1377A3
#1377A3
oklch(53.8% 0.108 234.5)
- #9D5B29
#9D5B29
oklch(53.8% 0.108 54.9)
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 #1377A3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean Blue #03719C ΔE 0.021
- Nice Blue #107AB0 ΔE 0.021
- Sea Blue #047495 ΔE 0.024
- Muted Blue #3B719F ΔE 0.026
- Flat Blue #3C73A8 ΔE 0.028
- Ocean #017B92 ΔE 0.033
- Dull Blue #49759C ΔE 0.037
- Cerulean #457B9D ΔE 0.038
Use #1377A3 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.